Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcf044e790e3eb2…

MALICIOUS

PDF

78.2 KB Created: 2021-05-28 21:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aa95294788f5368b0c9fb427673b442b SHA-1: 07d4bf54c83518a317d1bd6248247b71f57a1662 SHA-256: 3bcf044e790e3eb2993877f7d4c3aac1469c7a2b7df64295844a7cc63410f9fb
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm or SEO spam operation. The primary URL, 'https://botokaw.ru/strik?utm_term=harry+potter+6+pelicula+completa+en+espa%25C3%25B1ol+youtube', suggests a lure to content related to a popular movie, likely to attract clicks. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=harry+potter+6+pelicula+completa+en+espa%25C3%25B1ol+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5fd27b95d1593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_5fc94ed64ed7e.pdfIn PDF document text
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/a4a765b8a4adacf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5feb9535bba63.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/tawifiwuwadutunuza.pdfIn PDF document text
    • https://dikodaselafilug.weebly.com/uploads/1/3/4/1/134108642/5fe721cd11e784.pdfIn PDF document text
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/ganokekafopeja.pdfIn PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/6675147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368223/normal_6002ef6fbca3d.pdfIn PDF document text
    • https://fajevubesupuvax.weebly.com/uploads/1/3/5/3/135387480/270fb248ab16b3.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/3b1dcb0254.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/nopusakezibaxib_vewuvujumiwug.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/xavit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_6057b357bc626.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/5943446.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/lusemamiruvu-xigepok-minugegofa-jiluvakefoku.pdfIn PDF document text
    • https://saxetesaw.weebly.com/uploads/1/3/5/3/135301220/8379368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec3df2c-0bfd-4737-82cc-cd64ed115996/how_to_internal_audit_iso_9001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98754d33-1255-4dcd-bf06-19e256047a3b/87839865587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881e0529-e432-4dfa-b9d4-3d9706ba3a85/46529145860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a73b8-5de8-4f1f-a435-45e92be642c5/danapozeranigamav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a227d9e2-a073-48c4-b066-77477f9e647f/how_many_calories_are_in_dominos_pizza_slice.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 5648 bytes
SHA-256: d61fe033b66beaa186d729d2c689b70754d7642e441c2c6b70a65c24036ff317
font_01_sfnt_off000103fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FB 11292 bytes
SHA-256: c18f1669c3f100abfb8b8d4203db10adbb9fc0835770fb4b70e4e1007e7bc4d0