Malicious PDF — malware analysis report

Static analysis result for SHA-256 f252fab54d4e1719…

MALICIOUS

PDF

76.4 KB Created: 2021-02-15 11:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d99bf13581c1258a5ea5cc2cfe9035bb SHA-1: 5573413ca1f806f7e3765d8c8ebb264b11d3bdbb SHA-256: f252fab54d4e1719e6e5b37e66ebfb164b7cbf66ce55d64dd863633404298733
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary visible link being a lure for "Blackmore's night full album". The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful 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://jacksth.ru/aws?utm_term=blackmore%2527+s+night+full+album PDF link annotation
    • http://segway-wheelchair.ru/jplay_crack_6.221zoz.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/kusikefo_popowagemobe.pdfIn PDF document text
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/lovapemavegamivej.pdfIn PDF document text
    • http://stalekost.site/tedezanamafemepesodugee7zhp.pdfIn PDF document text
    • http://sfhgfje5df.xyz/741658890692h2l2.pdfIn PDF document text
    • http://domainlimax.xyz/arrl_band_plan_chart7lgl5.pdfIn PDF document text
    • https://zimizediregewoj.weebly.com/uploads/1/3/4/0/134040679/lisewonokuwudawo.pdfIn PDF document text
    • https://jofanota.weebly.com/uploads/1/3/2/3/132302765/2618440.pdfIn PDF document text
    • https://jakuxilo.weebly.com/uploads/1/3/4/7/134711712/ladomolomubog-fonezubud-lubinorakem-xajibotebelifat.pdfIn PDF document text
    • http://busibear.com/677873045685010q.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/4744863.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/rikolesafuwofar/10389894040.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/12507134492.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/87801541901.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/compare_and_contrast_worksheets_for_third_grade.pdfIn PDF document text
    • http://pojoxonofed.rf.gd/alistar_jungle_guide_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/bohemian_rhapsody_movie_live_aid_full_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/sample_lab_report_discussion_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/bulova_precisionist_262_khz_manual.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_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 5584 bytes
SHA-256: 54fa748746ac713cd188b0b1cb137d3b78c1d5ea9bcce103f8378cb01611e6ec
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 11540 bytes
SHA-256: 198526bea1a501781b307f55b3f231b3c6820a250aa8f4975a79d990679fd11b

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