Malicious PDF — malware analysis report

Static analysis result for SHA-256 088faa76059abfb3…

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 10:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10f711b8fc2594eddeb705cd9c981a7c SHA-1: 7fefacc0493fad789cd8969ec846839767b2fe48 SHA-256: 088faa76059abfb32a98b02add65b7b9d41b43d7533196a66f2ecb7f55edcd06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, while some are marked benign, are part of a larger pattern of redirection, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075520fea744---pepazijipuw.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/07536rek719gqauqjb7ga0od0f/dimupazo.pdf
    • http://omonetach.pl/foto/ilustracje/file/42147490558.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0fd6e1ad86beefe3fbb8a38797d1f95c/30934358856.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/80997644847.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5b2002f53---kuvigubabutokozat.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847db94496b---vuvesipatufataduto.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b56dbd4af---8852774225.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b555a6057ee---wudezemorefutogizibej.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9e8e44b9---kafosajabofulutu.pdf
    • https://evrenmentese.com/upload/ckfinder/files/70081215786.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/b75b31674d64c0b82b65741d693b9c25/39477824118.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b101c028947---kovasubakofijawukawuzu.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160997089eff60---51668386555.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7f9d133d1092eb6dd927025b6959c3a1/54738034775.pdf
    • https://alshamiltrading.com/alshamilfiles/file/44988601839.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b985e5dd473---xigetifajodav.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c8553bd2bb9---lagiroxigazufenegugefo.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/de38d9a93304fb8630ab8596b4657fbb/weviwezosoka.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d06917f7cbeeaae9f06b637f5514a9fd/mojavorijomon.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=old+manor+house
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc1.bin
07e4ca832a9f093abc4fcccba94a02e394175f223361e2a8ab9dd00c6f2c3fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 17580 bytes
font_01_sfnt_off00011aca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 16792 bytes
font_02_sfnt_off000132e1.bin
83a55017ccbdb43de9d72391380d88f87b34a8b2558fd21539f822f87f41209d
pdf-font-stream PDF embedded font (sfnt) at offset 0x132E1 10448 bytes