Malicious PDF — malware analysis report

Static analysis result for SHA-256 46637ee69d1c4cad…

MALICIOUS

PDF

71.2 KB Created: 2021-06-03 10:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e8da0d155494b2012f7a8272bdda14d SHA-1: da7878c6d603ade4b4bd3aa2c3d079afc035f459 SHA-256: 46637ee69d1c4cad98a2e8d615be6a29e8f0d7827bf5a8bc3d8c333f892edcdf
156 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'free download ps4 emulator' and embeds a large number of external links, many of which point to other PDF files. This behavior is characteristic of SEO poisoning or link farm tactics used to distribute malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/pbw?utm_term=free+download+ps4+emulator+for+pc+full+version
    • https://gojanevalu.weebly.com/uploads/1/3/4/3/134353606/wenazafujuvosifej.pdf
    • https://kivopovolufom.weebly.com/uploads/1/3/3/9/133997215/524561.pdf
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fe90fe790836.pdf
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/nowidakabizi_migurerogike_gitemorevo_siduza.pdf
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/4610175.pdf
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/dumamubugoxibes_pifiwijidajom_xevusaz_pugoge.pdf
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fe4d4d0de741.pdf
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5ffbc5edcc01c.pdf
    • https://static.s123-cdn-static.com/uploads/4445881/normal_5fcb566d01385.pdf
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/8690625.pdf
    • https://givurarole.weebly.com/uploads/1/3/4/5/134578012/konuxujosob.pdf
    • https://cdn-cms.f-static.net/uploads/4456134/normal_603b1c2d75cc2.pdf
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fda954d80a57.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wufamazajo.pbworks.com/f/diviser_un_nombre_entier_par_10_100_ou_1000_exercices.pdf
    • https://uploads.strikinglycdn.com/files/6eb8b96e-04e2-4751-bb83-b4986c8d6cef/cut_50_plasma_cutter_tips.pdf
    • https://uploads.strikinglycdn.com/files/79dad180-78db-4d7f-828a-03d582853dca/82039264012.pdf
    • http://pakesobiroge.pbworks.com/f/how_to_write_a_personal_reference_for_a_student.pdf
    • http://zopujoxobug.pbworks.com/w/file/fetch/144423858/alessandro_baratta_criminologia_critica.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76d.bin
6903809cdeb6659b74e7264072e72cd4b944e0f3850b5c9e1a95a74e4f102b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 5496 bytes
font_01_sfnt_off0000ea2f.bin
6fc17381cb35bdb556b257f35e2abb9e66bca7803e87618b624fbb0fd391371e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 11044 bytes

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