Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5ec12719f92bfc…

MALICIOUS

PDF

85.1 KB Created: 2021-07-03 08:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be1001c7b1a2609227af30384361ae73 SHA-1: 799ff82f32757600bb95153e9919e000b5eeccf3 SHA-256: 3e5ec12719f92bfcb2a5b3c510760d44585145e2cc9e118fb8e9443f16b826f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious archives. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. Although no scripts were extracted, the PDF structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7473ae7dcf---zudilajinimedu.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b09cab8d9b1---legirogewivogotimexobimab.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/43506793956.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9eqvqlfhd7olp8b17i5tl33oc6/zidilupubazexitifigux.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/xukije.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f7ec8ac1c4d1ec2852702f62ec31bd9e/nevutopepixofuxot.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/bac1i7kovumt9n4aadb3e0a039/jotibatelidigo.pdfIn PDF document text
    • http://schokozentrale.de/idata/86914002233.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-30/20210630155425631552.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/jotepipojixefigurejowalew.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/xixazusubozabuwefalibuwig.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/60627322693.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6v1pbnrh52hdlbl6ig5tc1ic84/67649364624.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb55c9572b---gedibudukobalukalebunub.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/jifawekebubetebeluporew.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/59008781481.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/62332689734.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b838733e3be---saxujafolifuzegor.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/tigezira.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc8cde0b6---tusad.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/55519534722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=file+manager+rootPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 1668 bytes
SHA-256: 0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa
font_01_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 10260 bytes
SHA-256: e79bb92ecb6fe764dc42d497c35111a5755e2506c70f9ac33ae03a0d958e905b
font_03_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 16940 bytes
SHA-256: be1775f99188dc44a9bfa600d68e7d9094ba929e645bb034a5d20fbb252193f2

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