Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea438cd13058fdf8…

MALICIOUS

PDF

74.5 KB Created: 2021-01-29 07:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c7c99cf2541059e892954f7968a9edb4 SHA-1: 7913dd03c5e4520028abad62886ff2a01f7fc607 SHA-256: ea438cd13058fdf8d3511e3d6bb975905ce4b9cf1691d49dfc0d6dbc6a189724
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/wb?keyword=batman%20cartoon%20tv%20shows%20list PDF link annotation
    • http://xawinagolagiju.iblogger.org/base._pbp_file_for_psx2psp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fe80e4ab0304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_6001ce60da738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_5fd97663d8d36.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/togakulemidapof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_60118ba832ea7.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/limozavisopim_menamasijez_pasul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fe8ab14e7a35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379370/normal_5fc79e1ac1921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5fcee0af37af9.pdfIn PDF document text
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/nijavopelanozutakale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_6000034f86535.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/bunenebugaxudov-bagoxotunopenu.pdfIn PDF document text
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/0701ef034.pdfIn PDF document text
    • https://detimuveruriwus.weebly.com/uploads/1/3/1/8/131872178/xesudimumu_xedimusot_gilefovisuve_jinovifitup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_60050849984e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zesixefe/confrontational_naming_worksheet.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_off0000e517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 5240 bytes
SHA-256: 0a10c3c2a448e912cd5763e3cb71797a7fe3eef2cb45c65911369eb21a0ecbb8
font_01_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 11572 bytes
SHA-256: 471dc45e70e8e8524a159f520cd0b6a3e297bf53c6827c731e3c3b3a6db4a6a9

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