Malicious PDF — malware analysis report

Static analysis result for SHA-256 8933bd44a7ba641e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 03:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bb18efaa2755dc56322be71870d75643 SHA-1: b0f8e6d59327231be16e3d73e0e49a0eae1dbd4f SHA-256: 8933bd44a7ba641e3cfe49b574c651f626da1b67a5b6136247b46f5d160e0255
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with many pointing to disposable hosting services. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to manipulate search engine results or lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://kuzutuzo.ru/award?keyword=subtracting+fractions+with+borrowing+worksheets+pdf PDF link annotation
    • https://kadamoxezegawuf.weebly.com/uploads/1/3/4/3/134347408/gafurikixuzu.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/172371.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/5a9b4d611.pdfIn PDF document text
    • https://xafijaxipumin.weebly.com/uploads/1/3/5/9/135966545/seligipuxav-zazevodux-denil-pakufevinuluzo.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/idjgGhd/xazonosajoxa.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/zinuweteroboge.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/kazodonipemibidam.pdfIn PDF document text
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/pakujapubi_vaxabojixonovov_luduwefulilowe_dewowagiwi.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/79fa28f8d8b4.pdfIn PDF document text
    • https://wexixumativedo.weebly.com/uploads/1/3/4/8/134865676/didoziram_digujiteva.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/b12e94.pdfIn PDF document text
    • https://nilozirarita.weebly.com/uploads/1/3/4/4/134463528/maxowanud.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/hibhije/australian_venture_capital_guide.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/7624025.pdfIn PDF document text
    • https://cdn.sqhk.co/fololekumi/JWJjcbt/one_punch_man_season_3_netflix.pdfIn PDF document text
    • https://fofodivadi.weebly.com/uploads/1/3/4/8/134895081/618504e93.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/vIjighw/61724935201.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/jijemuruvokawus_sobolodomovujod.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/gficiir/xologosunolumemadewulixuw.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/5291209.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/vuraradaso/karimganj_district_nrc_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/gf_guide_to_divorce_season_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/sifuwexovolazofu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/volaperetezudizem.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/71694081164.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 5784 bytes
SHA-256: ecde9880af0eeaf26f60d024d2a4832d656cb2a472bd5ce323b609c9f1a7bd90
font_01_sfnt_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 10456 bytes
SHA-256: 110103b390f3653469bf1ffa683d162d383f0d2249e2e98b2b447001dbda14fa
font_02_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

Open this report in the interactive analyzer, or submit your own file for analysis.