Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cb7c1e1b4e3b2d…

MALICIOUS

PDF

95.0 KB Created: 2021-06-18 21:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ca85e44a1ad1bde7fe297263f839cded SHA-1: 5b43cfa990553911c4e3584e2fd9995647277924 SHA-256: 60cb7c1e1b4e3b2d502b7d13ebeba5cc543670bd6dc33f84489bc857a347db68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca0c564b19---segimevofawanuwada.pdf In PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/pikididaxapinataj.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/161e5142054d07044eeea5b12e825008/13354072382.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607670adb419b---wotoraxodivenofojol.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f131b4a3964265f219c2340048fdb78/33292794178.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe5ab0698a---74709104176.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/968a0c608fab79c2fcadd3bad142f6e9/lufugodinutobisopux.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8f7u05egkuc99pfcl5mr9a7qij/86317245249.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3b25b95b6037440eaf7647cefab5a701/didabilojudazu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/0137ef2a3713f00d14bf8b905481dc4a/22068919112.pdfIn PDF document text
    • http://kids-ex.com/diwuzupifaxetimal.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7f6341a39---nigutuwapuximutip.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/26564901037.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/41035749482.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8f06072d659aad9a021521feef997a2f/79499129063.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afbf62337e---gavopelapol.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/f3e0e71202bc989983412fa26e300148/fopozusisofixogojigonobu.pdfIn PDF document text
    • https://www.carrentchiengmai.com/files/87263545883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=major+arcana+cards+in+tarotPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E13 3544 bytes
SHA-256: 1da83803ae906cafba4a347ddf0f0c2bc82311c89f45df8130de73609ffddaf5
font_01_sfnt_off00012ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB8 4652 bytes
SHA-256: 3e508d89b061633d1e01c6e389fcf410f28e5f8070ef09bea9b94eda8a6999f8
font_02_sfnt_off00013a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8B 11324 bytes
SHA-256: 10978785d5060a7a46d6069480d3014feb8469ccec709072b1e81b177b820823
font_03_sfnt_off0001609b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1609B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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