PDF malware analysis — malicious · 6957f1c6f875685c

MALICIOUS

PDF

95.5 KB Created: 2021-06-28 08:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 1a40faa61143c2e7045d6abd5963944b SHA-1: 2708e02db3e7eda7f47651c5295706290b511699 SHA-256: 6957f1c6f875685cfd56f7cd76014c83475cd250c169a6929bfe0c1c27fbc788

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised websites, specifically WordPress installations, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to potentially malicious sites for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9528

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0afe54242---fapujumirevedebani.pdf In PDF document text
- https://weilaimachinery.com/userfiles/files/99047400544.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3aad58fb9---tivej.pdfIn PDF document text
- http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dcc838d69---38085307488.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/6vgndud71jrdslb7ekfi685p11/80735219952.pdfIn PDF document text
- https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/657f745176e167f9cd8bfc712a2782ed/17500949888.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4637faea6d---bozutipo.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d5e1b7f14---junijuvogezedumexa.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608a059502f8a---melumofi.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782a7fcb92f---61968083400.pdfIn PDF document text
- https://gifarlcm.com/upfiles/editor/files/55381726754.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a2e57a139---27406955133.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d490022d7---35245088743.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/2g2bo60acgkavt99ensg88ih4a/11210715619.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f57d47e46---60802959117.pdfIn PDF document text
- http://shelton1961.com/clients/35589/File/8577479463.pdfIn PDF document text
- https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098add765633---31049858090.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/7ucc1n8i7r93cemc2h56acfcn2/96842185323.pdfIn PDF document text
- http://dighakanchaninternational.com/FCKeditor/file/4937891114.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021052204222973499.pdfIn PDF document text
- http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/rolevofox.pdfIn PDF document text
- http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/70075800727.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/47dd27f80989d94ae6f8e890e596883f/26140648809.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4f2e7304---kubumo.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96ef77c0d---wawisujenumirigosu.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7683d3aea---83848628583.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=technicality+in+a+sentencePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000f24c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF24C	16540 bytes
SHA-256: `cb429fbb70a9e1736af609d2765f9a72a14287053306f14ac645b26b3a2a745b`
`font_00_sfnt_off0000e633.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE633	3052 bytes
SHA-256: `c18686a85af5e08a2f667405eee1d107a1a314ff8b14e0deaf83eab07a536952`
`font_02_sfnt_off00010935.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10935	10184 bytes
SHA-256: `b2201261bbcce57bf52ac1575a6b9cfbd12ae88b837f016cddb9d33a3539b5f4`
`font_03_sfnt_off00011ffb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FFB	21648 bytes
SHA-256: `b09b4ddf790c349c9eb774037c17c0b8d92c2ee2e1c07533563844b79517b035`
`font_04_sfnt_off000155da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x155DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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