Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aad3515f8b92412…

MALICIOUS

PDF

69.7 KB Created: 2020-12-17 04:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7975568beed7cb9c113c7dec985ebda3 SHA-1: 18bd5bef9886b1673b38f1d1109f8e7026c5828f SHA-256: 9aad3515f8b92412e719a37c8e9b2b4a9f0dd0879c2b2230076e75ff8f1b3eb6
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The presence of a 'download button' heuristic and the ML classifier's high confidence score further indicate malicious intent. The document likely serves as a lure to redirect users to malicious infrastructure, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=chisago+county+jail+mugshots In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/81b90f4420.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/ce5a5fb4e6c9b6.pdfIn PDF document text
    • https://sagekafota.weebly.com/uploads/1/3/4/3/134351395/tudirev-maxaras-pujok.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/wupov.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/niwevejuf_teripar_nutudu_nufobib.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/goved_sajed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5faed10698e53.pdfIn PDF document text
    • https://jatolesaz.weebly.com/uploads/1/3/4/6/134645106/fojeriduxenibiwak.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/9794565.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
    • https://uploads.strikinglycdn.com/files/a4cdc5f6-7c73-407d-bdee-790f551412d5/one_hundred_love_sonnets_pablo_neruda_analysis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc396a371610b8777734/1606220857914/xosurubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3aaad66-c276-4a56-8261-c2fa4d55cdc0/sijaxozanotofulejetatezoz.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_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 5080 bytes
SHA-256: 59d66be5aab77a7e2386e0c873a645f27cbc4061c189171071bd745d7b45b1a6
font_01_sfnt_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 10536 bytes
SHA-256: e00efa266b43e011e7ee20f54bd4e1dd91d54b8afcaea9c54eb4754ba8deb000
font_02_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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