PDF malware analysis — malicious · 9cbe5684552b4481

MALICIOUS

PDF

89.7 KB Created: 2021-06-27 08:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 8e1773a653eee1c6c0fac80095d94867 SHA-1: 9bb6fc66ce7a1b2483aa8fb751c9095fd716907e SHA-256: 9cbe5684552b44810936d0ddf40a4bdcdb0ac738de5c7c6899f7ec4c2729f160

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm, with many URLs pointing to compromised WordPress sites. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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 http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mu8017r6etna66d2fdnvq9gh4v/vivikasekulabexinisut.pdf In PDF document text
- http://softwarefactory.nl/images/file/noxixopebexun.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d57bf733---23042717843.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/59befcbbe41929fa367adac79a2d75ca/93092626690.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee60917d5---diroxatexedune.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085b9d0011ca---71350953665.pdfIn PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/935kclm6rhtd4hsj67us2vcuh9/rakukaxesifobofosefuvek.pdfIn PDF document text
- http://slsnn.ru/content/file/vajube.pdfIn PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1ldvng0vchomfgoos1ktkeo0s5/68288303725.pdfIn PDF document text
- http://dalboncostruzioni.it/userfiles/files/21018377356.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f6fccbee4---34124856497.pdfIn PDF document text
- http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/kevamos.pdfIn PDF document text
- http://screen.by/images/file/riwenakaziseraku.pdfIn PDF document text
- https://chezgregoire.fr/userfiles/xodasejemiwowufexulubija.pdfIn PDF document text
- http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/notibodusesuzugonabale.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdcce0688---nedofasopamovusenufeji.pdfIn PDF document text
- http://lighthouseofworship.com/clients/44803/File/33777883627.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b6abd80cc---wasekuximezukitij.pdfIn PDF document text
- http://100gastro.cz/soubory/files/61948739409.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b30d7f93809---85077289999.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cb4bea6ce---poduzebamiju.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/01273d1d05f91c4b17bd3aba5af35ed5/depikuxugegedazu.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/xawekimopejuroletif.pdfIn PDF document text
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/ac020615f58b222ff4209850894adc64/mijufoguzeb.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607369f362f3e---musebudizav.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rti+tier+1+interventions+examplesPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f94b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF94B	17364 bytes
SHA-256: `e5f80b702d1249e6c359af9a14d65983346f5330eceaa366abdd56acbd06d9ed`
`font_01_sfnt_off000126da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126DA	10676 bytes
SHA-256: `20be58a3a89668fa072950aec27e77c745ca1bec64d897dcf0c9b08608fd7771`
`font_02_sfnt_off00013f6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F6B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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