Malicious PDF — malware analysis report

Static analysis result for SHA-256 452b08b311b698e5…

MALICIOUS

PDF

76.2 KB Created: 2021-06-01 03:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c5441cc573631f57f613b670c593b262 SHA-1: f73f95a6173e4cfc5f0f1379644ef0429f416ea0 SHA-256: 452b08b311b698e5d686edbefc9cc3730e37e94c16b9bfb4bd80a36afc3d2f78
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains keywords that may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://allytemp.ru/pbw?utm_term=marzocchi+bomber+z2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469640/normal_606e6e3831b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_60638751c947c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fdaadcdc8906.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403407/normal_5ffa247ed4f59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5fca93b66866b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_60092263baadd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_5fd7b29e42529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_60482fb7a8408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481400/normal_60244701b2694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_5fd7b2bb5da80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://supatibu.pbworks.com/f/nadebuzuletiloweroreno.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144412251/reversionary_life_estate.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144425838/minedijezunixepesafo.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/pipe_fitters_math_guide.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/takopemu.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/48801267947.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/cant_sign_into_venmo.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144428889/fifezokitomobabowita.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144427971/diary_of_a_wimpy_kid_the_last_straw_pages.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144415707/73904403338.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/xowotoxunipavejig.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_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 4760 bytes
SHA-256: 8ce99448768b636c02b551594cffba0378d292eb6a27d1c66bc8444b6b00a797
font_01_sfnt_off0000f1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 10588 bytes
SHA-256: 0080c921503fc11790ca1f7d01bd6b99624bca1c310c2a904b2487d2496a1711
font_02_sfnt_off00011598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11598 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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