Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1370e8920130044…

MALICIOUS

PDF

69.7 KB Created: 2021-04-03 20:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37b2d62cbc77215f892e54cbb3eea475 SHA-1: b980cb9a116f5e2ef98afe239dd6f2eb75ca7212 SHA-256: b1370e892013004438d748f13742fd0376a669bfece15d5c06a426d6ff76e179
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-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://kuzutuzo.ru/123?utm_term=zojirushi+bread+maker+manual+bbcc+s15 PDF link annotation
    • http://xubaseki.iblogger.org/small_tv_with_dvd_player_amazon.pdfIn PDF document text
    • http://discovljzg.fun/vitubobobirezanaaipar.pdfIn PDF document text
    • http://tevfikyuce.xyz/why_does_my_samsung_washing_machine_not_spinhmxnb.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/lijid.pdfIn PDF document text
    • http://fastpeysistem.online/621430989303l5ds.pdfIn PDF document text
    • http://zuvixomajav.22web.org/42005211315.pdfIn PDF document text
    • http://useporte.xyz/papuvasexutozulawarovop1r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukuzem.rf.gd/receipt_bill_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873550c4-f832-4430-bd67-96d2b78d81b1/is_minas_tirith_a_real_castle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29af6df4-da34-4336-86d9-228c46b2a119/12105653329.pdfIn PDF document text
    • http://gasunerumep.rf.gd/giradamalotejukibikixuxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2abbf7-e6a5-4222-a839-5aadd3add88c/4th_grade_math_jeopardy_division.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2848ec08-9bf1-4ac3-9f7b-13561190b01c/sisog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd248bb-2226-466c-b3ed-ccc0a5be90e3/fukoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcfcd75-61b8-4fe6-bf7d-81acdba9b6b9/samsung_printer_xpress_m2825dw_troubleshooting.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/gabelo.pdfIn PDF document text
    • http://xikusaduxofi.atwebpages.com/whistleblowing_ethics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6026d32d-fc29-4fc1-a373-4a54eee52691/possessive_pronouns_beginner_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46df56ad-58e2-40b5-8e24-c349d82646a0/fagawakaj.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 5592 bytes
SHA-256: b3bc6b05544522b7f7078a3b578d5b038bb238ace5fc5cfc06d8ebef89e7d200
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 10988 bytes
SHA-256: c329d998ca2b47dfc6bc1ec63b790c3b73f49521fa7c10aabb6b0b2b6ea35e2c

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