Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbea29b1a5bbe859…

MALICIOUS

PDF

99.6 KB Created: 2021-07-26 04:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ac933c5ba8ebd3cf833c4b727228374b SHA-1: c6afd0b57c28f6303e342cff6afb112aea8d47da SHA-256: bbea29b1a5bbe859184bed1d5923e60ad7107199cbee6572aff048509babd6c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/mnr02evmg7cu4ep7m3bbng5u18/56869377031.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b541687b2dc---gisinusanelugunetoz.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/pixugugokijifu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead38f2a51---67269050547.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/evu9nsr14a2f9i0oqhopqhnq1i/39441631401.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714f90c1272---nejogi.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xosijomabud.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/80099708657.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50c5c3d72c---39430333875.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/99771533643.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/8405641105.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/vovlnfup8rmuiie967uth91ohm/kixadujinafa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8a41b410a57a0b48e22eaf21fd4c5813/seforigowex.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cdbec7d18---90582537096.pdfIn PDF document text
    • http://aimic.com/userfiles/file/93776637536.pdfIn PDF document text
    • http://hasyo.net/files/file/muvibotulinevuri.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098c149a7ae0---26279736318.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075825ea7fb7---2963590304.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f223f37dd96---disusixopamumalo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ac456822---zopiput.pdfIn PDF document text
    • http://tulga.ru/editor/files/tibilisuzukadirok.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fdb66b7341e59d3d9536334039541e5/tamaj.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2a5a388f---75207119563.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/22124968266.pdfIn PDF document text
    • http://belst.by/upload/file/dalipofidinafaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=site+g%C3%A9n%C3%A9rateur+de+compte+fortnite+lobbyPDF link annotation
    • https://mediaget.com/userfiles/files/gizusemowebala.pdfIn PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13203 11376 bytes
SHA-256: c772c053317213cf8d339330ac1c0cbe74120fe11740de8366c498d78465ae7a
font_02_sfnt_off00014c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C19 19724 bytes
SHA-256: 082abdea40eea4057ad9066316ebf1185778abca7798b3f3849aa5cb6de567f9