Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9948ec1162abf63…

MALICIOUS

PDF

65.6 KB Created: 2021-02-02 07:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f552e366d6c5de7e3610cb38e5e0a51e SHA-1: eeab630932df57f4fa47d308847bd49c78a5f4d6 SHA-256: f9948ec1162abf636eed50260f9ed295871f04d2ea4d5e42d04298cbc2e9da65
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://seumenha.ru/aws?utm_term=2019+calendar+singapore+excel+template PDF link annotation
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/3376386.pdfIn PDF document text
    • http://betmoy54.com/gunblood_remastered_cheatsbj52y.pdfIn PDF document text
    • http://begetus11ppz.xyz/techniques_of_data_analysis_in_researchz1laj.pdfIn PDF document text
    • http://popularchoice.space/793632448698t7lz.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/rizinerit.pdfIn PDF document text
    • http://istlan.fun/lexotabexadokaxugaxave8eam5.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/5phbJgW/58668440816.pdfIn PDF document text
    • https://kebusivurokolu.weebly.com/uploads/1/3/5/3/135317059/tozivowub.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/bodip.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/ejjgjL8/dojelugiguzuwekefika.pdfIn PDF document text
    • http://talebakela.iblogger.org/acca_f7_financial_reporting_past_papers.pdfIn PDF document text
    • https://dasufurejer.weebly.com/uploads/1/3/0/9/130969026/dabusovanikag_dewanozemasejo_nususu_zagowos.pdfIn PDF document text
    • http://pavawafupef.66ghz.com/crocodile_rock_piano_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/t0ujelE/18241887493.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/Pb5vjfQ/john_carpenter_vampires_1998_trailer.pdfIn PDF document text
    • https://fogisavelubid.weebly.com/uploads/1/3/5/2/135299906/pulenalumux.pdfIn PDF document text
    • https://lolimoxozidexus.weebly.com/uploads/1/3/2/6/132682882/3d665fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzopixakaj.epizy.com/67891066099.pdfIn 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_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 5848 bytes
SHA-256: 9e731413db12bc850e4b6b12e58193692db3cff824432aff425991535e4b1edc
font_01_sfnt_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 9932 bytes
SHA-256: 224083f73b749faf91e6397952f5014c61b8a4b08fb5f6281ab20b1684c30d4b

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