Malicious PDF — malware analysis report

Static analysis result for SHA-256 0050d159f06d1c7c…

MALICIOUS

PDF

101.3 KB Created: 2021-07-16 09:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59c244866a63eda4f1bd80f99e096427 SHA-1: b867b84c69b2c14d56394fe04ae9003e1f7452f5 SHA-256: 0050d159f06d1c7c96767125f9030e6a8ff0c70d5252870eccfca04482e2aad1
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm designed for SEO manipulation and potentially hosting malicious content. The presence of advance-fee scam and callback lure heuristics strongly suggests a phishing or fraud attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely a phishing lure or part of an advance-fee scam. The ClamAV detection further solidifies its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=meikles+hotel+restaurant+prices
    • http://aarogyamedico.com/userfiles/file/nolatumekozu.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609568f50b3ae---vesuretagikodofatuxetus.pdf
    • http://fotossc.pl/_files/file/21453076884.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c038b14ec76---nuwugonuvuvufabedoposaka.pdf
    • http://weberstellen.ch/userfiles/file/vosibajupibuvo.pdf
    • http://goldcoil.com/uploadfiles/files/pikagisoguwuxomubixajuje.pdf
    • http://alnoorcity.com/userfiles/file/53628816282.pdf
    • http://beijingbeat.com/contents//files/56609059586.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/34f2eb4afbc7d9b779d250e4869e2f4d/64133840841.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/h564dg414aqtijkq8sj5vr54pa/nifezopelaxatetalukemarut.pdf
    • http://iseveranscopy.com/upload/editor/file/30556842336.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607cacc923923---45416446765.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/34ed15ce797efeca78ad0225c755d5a5/70687721100.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1527947a3---41385071272.pdf
    • http://wsm.hk/images/uploadfiles/file/pokelusif.pdf
    • http://keacg.com/upload/files/80924384560.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e131c169a22---94818962208.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f9d7eafc---26882943837.pdf
    • https://kopari.hu/files/file/wogoxi.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/fivenazizozipedazomezamib.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/9neo4tvi7s8hbv50omn5j7abib/lugubupib.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7256ce4bac7cbae304eab71e47d41153/lazugowudabomiwaga.pdf
    • http://tipiland.net/upload/file/tebanumozosutinavateja.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/ae8f4f4cafab6aa248f8859631535671/32326633882.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/12477121212.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cff0d73ff2---52800496710.pdf
    • 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_off000122c3.bin
472cb3d557876581d9f1c8c0a81bc0ee4a26b7c31abb8f904cfa3baeb99b89fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x122C3 10656 bytes
font_01_sfnt_off00013b2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2B 16792 bytes
font_02_sfnt_off0001533d.bin
dff89edbdbc27586c30086fde7bfc917a324b881b94cdba11a996c989a43c586
pdf-font-stream PDF embedded font (sfnt) at offset 0x1533D 19388 bytes