Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c0f99b6bc9aabb…

MALICIOUS

PDF

76.0 KB Created: 2021-03-02 22:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be01daf0dfc0f0d3793b3d6326408a80 SHA-1: 9942aa91a6f4a3ba4f848bf52421dff7da5bb2ba SHA-256: 34c0f99b6bc9aabbbeb7cb1c3887708bb0e333fdeb79ab1be325fc39bf3d71d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://zajinet.ru/wix?keyword=la+fitness+plano+east+class+schedule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446388/normal_6005d7857e471.pdfIn PDF document text
    • https://cdn.sqhk.co/ruretibot/dCvORXY/stickman_dismounting_apk_hile.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/fb5d49e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fcc2f4d1f0ce.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/bijBhgF/24481648082.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/glhdJjg/meilleurs_experience_playstation_vr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_60240f11929b5.pdfIn PDF document text
    • https://nozezezolakufu.weebly.com/uploads/1/3/2/6/132695232/xisojedemusetemup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fd34657a8cdc.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/ck5Hjiq/minecraft_skyblock_ps4_free.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/67266412562.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/sisebikesibekitik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409110/normal_5fe1b0b9d9cb9.pdfIn PDF document text
    • https://cdn.sqhk.co/mibazudifij/Etfhclw/kewuda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/45949448680.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5088 bytes
SHA-256: f06acd6e4da3aa9b5b6183637bec71b48dcb6f5b9e728d4d9abad85f24981703
font_01_sfnt_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 10420 bytes
SHA-256: be83b2986c006816cced0c89a67069ce47cef355b64553bce91b3c3ed1eac79f

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