Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c09f9a87c69f86d…

MALICIOUS

PDF

116.1 KB Created: 2021-06-11 00:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aed5b6405a8bc9369a523a72d8132256 SHA-1: 59926c0b47ea8ced638c323568b1d03588a45861 SHA-256: 1c09f9a87c69f86d7e2c707294b6c852788d9621e12d715c899b1c609bf6a323
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/nibetupa_memuwuwasisazin.pdf.
  • 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://ketchas.ru/pbw?utm_term=kabir+singh+mp3+free+download PDF link annotation
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/nibetupa_memuwuwasisazin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_60c06ced9ce7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_60165857e5139.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/7073111.pdfIn PDF document text
    • https://zofasakibure.weebly.com/uploads/1/3/6/0/136049738/foxiremenezilizuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fdeb2eab5259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_604711a569054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_6062c84ecc397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421778/normal_5fd319335a6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_605b97cb7859f.pdfIn PDF document text
    • https://domalaxugopomi.weebly.com/uploads/1/3/4/6/134606687/5976666.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4482190/normal_60b6ea56c2636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_6051e727499a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_60bd742fea029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d732160-1f59-463e-b004-9d41703b025f/gospel_of_peter_talking_cross.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36add96-e056-4b95-b8ce-4e7024012272/harry_potter_and_the_half_blood_prince_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f48b6c-442c-4b83-bbcb-5c2ed5ab803b/16142893467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c9e0c9d-3ccb-48e0-92f0-338c3ee91831/xavegolimewivadujapomoven.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1762F 5820 bytes
SHA-256: 83a3191229bb5812638aef8aa4710b9fe9acb2bdcf429d1cef25b2fa31fb5808
font_01_sfnt_off000189ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189ED 11232 bytes
SHA-256: c38e16263f84ebd14f5ec72351bd1d71464b33600e4ed25ff7621fe81e9ec2ef
font_02_sfnt_off0001b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B047 4312 bytes
SHA-256: a7d29c8f4a4396c45ddf6b6d97cb3027f7bcb7a4c83f1821c05f2161fad39f43