PDF malware analysis — malicious · 479b07dc677b7fbe

MALICIOUS

PDF

87.7 KB Created: 2021-07-07 09:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: bd3d8c326f31deb42706f3c0eb7eebaa SHA-1: 0cc4e50859ccd1c94e2b439cf888fb808829ccfe SHA-256: 479b07dc677b7fbeaa4e84910cb7122e8b5743cfda3b8fd3159c6c1a1aa4a6cf

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The presence of 'utm_term=usps+foreign+postage' in one URL indicates a lure related to shipping services. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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 https://nomylo.ru/uplcv?utm_term=usps+foreign+postage PDF link annotation
- https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/bd8243c686a0d2e01a647ee9e1f5b853/potevezoxek.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/rjpr6mlfrako16k39ffhiqolc1/jozawebujupav.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/orl6duvhbaje3cdbg2sspn2tgj/65331876300.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a73381d3f04---tezaka.pdfIn PDF document text
- http://kadh.kr/bobod/upload/file/sukamozuwo.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nc8ib4tsaph14m1n36apkj4gvg/dunodogi.pdfIn PDF document text
- https://sunarchegypt.com/userfiles/file/26580990600.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b5799ede6184ef2a2c40b5c51c8ded91/tibakilukubebetoruwegi.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094d558232b7---suvenit.pdfIn PDF document text
- https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/718ff247d744001fd413a56d44a417a6/56969328749.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca68521a80---18603264394.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/41868913777.pdfIn PDF document text
- http://ifaistos.reality.gr/~triantaf/images/file/21636131648.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/88o6k1h8v235rtfeoosc3bfued/rijetelitokopubot.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/2d7bcd2ae639d2c4d3d7039c6878f4a0/panonizugajavaduzelupegim.pdfIn PDF document text
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/90oi9o51lt4t9a717usu19a9ak/tefebosibesuromodujem.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073b551a9dc0---wunuruserutew.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080005611fe2---47094878840.pdfIn PDF document text
- https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/e980e9138e10cbb943156d83f0a64ad8/74268448911.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/fe315d828bdb8f8d0063869ea2a2354f/mapimisorumurigugino.pdfIn PDF document text
- http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/40032466028.pdfIn PDF document text
- http://olgapolyakova.com/files/files/semusoxukirirebop.pdfIn PDF document text
- http://studiomanzella.com/userfiles/files/78062800350.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/tenuxi.pdfIn PDF document text
- https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a94f3cb8dd8dd873f54b573eab093bb6/28762511120.pdfIn PDF document text
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF365	17504 bytes
SHA-256: `2f2abf334db2089bbb0f52fc9e164363f519083da3b16066f934892bb66b4a2d`
`font_01_sfnt_off0001219b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1219B	10496 bytes
SHA-256: `23336409ab7092bed1a0426ff7700ef362c934aa7267266b91eb0dd04ab9fce3`
`font_02_sfnt_off0001399f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1399F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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