Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb15abf11b7ca1f0…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 10:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 36c156cc03d8f62d5d6b88d005c9459a SHA-1: b151ab634d1dcdf8636e950b864c755ff8182d4f SHA-256: eb15abf11b7ca1f0a7d9708601949c79e1ec8cce6ff2c95da10e3c80bb0245f7
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 0.9997

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://lozipotod.ru/123?utm_term=load+cell+1kg+datasheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fcb126313dd2.pdfIn PDF document text
    • https://wixapikolomuv.weebly.com/uploads/1/3/4/7/134746431/buzug.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/00694ae13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5fd789cf67542.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/ialTxew/xovizijurokaxirutakuji.pdfIn PDF document text
    • https://dopabazimago.weebly.com/uploads/1/3/4/5/134591427/5662203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490757/normal_5fe043a8260e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_6056bbb5621cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428335/normal_60083f972ccbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fdf15357f6c1.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/cjbpDTi/where_s_my_water_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/jgghZvA/react_bootstrap_select_form.pdfIn PDF document text
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/89c1c.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/hUickZ5/fojar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe37c99-7f18-4a0d-bad3-8fae6907766f/sepilaganosakat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df42c42b-5cda-4ed1-b15c-a6766da226b9/mudegeturixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a87639f6-3851-4fe9-982f-49a158a35bf4/96194569540.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/dating_landing_page_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2a2fa2-36aa-4da8-90bc-f46a76bf79d7/36195372319.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/fediaf_nutritional_guidelines_2017.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_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 5160 bytes
SHA-256: 3be17cac85623e07e5dc344959f515d2016a7021414652a6139403851a5414ab
font_01_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 19872 bytes
SHA-256: 3e5b9bf5d2ea696bed745f3667e4c96fa81ef6338ba58e17be7a92eaa55795ef

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