PDF malware analysis — malicious · 3ea240d57b2a1489

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 00:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 7263ac16b66592c270abd5140abac5da SHA-1: 57ff3aa9811ecb3894eafc246e2daf977136d858 SHA-256: 3ea240d57b2a14895c4333b8085e586139748a21c68bcc4c3706ed6bd07c6b33

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to compromised WordPress upload storage, suggesting it's part of a link farm designed to distribute malware. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. No scripts were extracted, but the overall structure and URL patterns point to a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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 https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5fb5d6c572dc1a0680c028137a4d2a3a/golurodixexuk.pdf In PDF document text
- https://creativitagh.com/pevron/www/img/file/papilomaw.pdfIn PDF document text
- https://la-klamm.org/userfiles/file/dizozisozenukezefubedi.pdfIn PDF document text
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608418563b395---xifumudujaridifusapas.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607278fb15647---10347006791.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3511008a---zufotupifonopuwerikixo.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160758ee40b1cf---gojumumitobome.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6a671e154a764c8f1e3e5c5ae5ecb414/47708052752.pdfIn PDF document text
- http://toyteepee.com/uploadfiles/file/210524234339994374adxmmn.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f702362df347b82e258fced123f20452/gamarajepebojezesigusi.pdfIn PDF document text
- https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/c0af401d57c9c09e8011c46c18d4fdc9/waladuzalowosajunu.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160702eb5e8acd---45076519714.pdfIn PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1263f6a84358599998345c355475b20a/48985038768.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c997bdd9b21---9581349349.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/49bb2c60878089f1500cb06cc1c95d96/4109420369.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160901ab3794ae---93771861177.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/pbebii9o6p9ihkmb1t4cqh1kau/24312177458.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/dd815b9c04a1a537c311e12f8ef96fcc/56886094715.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d82263556---71823725852.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160830ee291715---36791923522.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/xeraduga.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b058a5c93b---xawazibadezeta.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160801b1ac36df---gemebegikorapikojixe.pdfIn PDF document text
- https://pearproperties.in/userfiles/file/gagadowotumupebata.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+zip+a+pdf+file+with+passwordPDF 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_off0000f54e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF54E	10628 bytes
SHA-256: `15d7d7f86ac5f6aacc436977ac34e6157bff52971c51d32c395a2248f7e0c8aa`
`font_01_sfnt_off00010dcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DCC	16936 bytes
SHA-256: `e59f0cda203d5728af04d95a2c1b4a6c0ee255a6ea53fd3b46feda4badb8bc05`
`font_02_sfnt_off000139fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139FD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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