Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a111a1301ee664…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 23:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50d702349f0cd07751920cdbfbcc7b80 SHA-1: 3cc3895c8bfa54c160b41f8732971794d716a45d SHA-256: 68a111a1301ee664446b12885d0cef806de52730b13323f625ec750384d0a008
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/award?keyword=bible+names+and+meanings+pdf PDF link annotation
    • http://vivadoctor.ru/wibiwepikezerarufelexxf.pdfIn PDF document text
    • http://idealica-italiaoficial.site/85277528844vdd09.pdfIn PDF document text
    • http://spain50off.info/cctv_camera_app_for_pc7plju.pdfIn PDF document text
    • https://zunazodofi.weebly.com/uploads/1/3/4/6/134636935/0d3f6f18.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/3860352.pdfIn PDF document text
    • http://dlkmvkoenv.info/75939698899mndme.pdfIn PDF document text
    • http://nextauto02.ru/28032468744nwevg.pdfIn PDF document text
    • https://bupebilonozopi.weebly.com/uploads/1/3/4/8/134861312/ebea3ecf4.pdfIn PDF document text
    • https://xofisotojef.weebly.com/uploads/1/3/0/7/130739513/7892725.pdfIn PDF document text
    • https://xoduwotef.weebly.com/uploads/1/3/5/3/135328954/pokadadi-jedokafevux-bijeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_601dcfe7cb7ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450345/normal_5fec3085c1112.pdfIn PDF document text
    • http://heretythere.site/app_store_apk_for_iphonefjo2j.pdfIn PDF document text
    • http://shopee24.site/bizazixipku4n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_6026b1d9238e4.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/ziguxafifosafojet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484807/normal_5ff80e24dcd3d.pdfIn PDF document text
    • https://zikovawezuve.weebly.com/uploads/1/3/1/1/131164456/a319faf.pdfIn PDF document text
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/33cd069e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_661b55d254dc4603b350561a511cf63b.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_227f3e7fb7024db4af0c3cf6e636d0b1.pdf?index=trueIn PDF document text
    • https://621cd70f-1aca-46de-91df-1bd8162c3e90.filesusr.com/ugd/9f1ad6_ca69ace3e56c4dc1864ad201eba8aa8b.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_4d30bd70489a4376bbf367978387792c.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 5452 bytes
SHA-256: a9e437c0c409f50217e8a74fd85e974dd77f48b10c3a39ec4e6959620034c476
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 11404 bytes
SHA-256: a2d5d10cb68d12a3fad354e27bf3a84a6874023e43cca002d982673992943d91