Malicious PDF — malware analysis report

Static analysis result for SHA-256 919c9d9fbe3ff58d…

MALICIOUS

PDF

76.6 KB Created: 2021-04-08 07:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11b768ac265237507a63098a09ea3b5e SHA-1: 869a19f33bfaba1019464c3c7677dfb1f46de93a SHA-256: 919c9d9fbe3ff58d662654eabb714ac359d5507829f966fc35207b722756b642
126 Risk Score

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 0.9991

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://golowaki.ru/123?utm_term=2016+chevy+equinox+owners+manual+pdf PDF link annotation
    • http://trychambre.xyz/130511212020jgkr.pdfIn PDF document text
    • http://auth02mobility.com/network_security_private_communication_in_a_public_world_second_editionaz1ox.pdfIn PDF document text
    • http://tk-time.site/informagiovani_macerata_lavoro54f82.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/jabonetut.pdfIn PDF document text
    • http://profapp.pro/wodisejutoja2d3if.pdfIn PDF document text
    • http://biomaniks.website/who_is_zed_in_after_we_collided9u4i4.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/gcGSJOY/guidebook_app_for_conferences.pdfIn PDF document text
    • http://jakebaxujimug.22web.org/download_rawi_barzanji.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/b4Ziiw9/84995385734.pdfIn PDF document text
    • https://zisetilu.weebly.com/uploads/1/3/1/3/131382786/vumemol_fidivikozun_bijom.pdfIn PDF document text
    • http://sedouche.xyz/wosapuvu3azsv.pdfIn PDF document text
    • https://nonewogigej.weebly.com/uploads/1/3/2/6/132681399/9250d8611c0bb.pdfIn PDF document text
    • http://shoop-fh.ru/guidepoint_systems_phone_numberm4iwe.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/bbghthe/necromancy_definition_noun.pdfIn PDF document text
    • http://ruszaimclub.ru/graco_4ever_all_in_one_car_seat_forward_facing_installation2ith0.pdfIn PDF document text
    • http://busivel.xyz/riderimliw88.pdfIn PDF document text
    • http://naturaitalia.space/813424054664xd9l.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/xjh3ps8/44271938502.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/xulikamul/easy_flowchart_maker_online_free.pdfIn PDF document text
    • http://jilimevidofus.epizy.com/panufubexuzetelif.pdfIn PDF document text
    • http://wolujalazov.epizy.com/21223203918.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/spectrum_tv_guide_albany.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/74254399694.pdfIn PDF document text
    • http://zoriwotub.rf.gd/ba_psychology_books_in_urdu.pdfIn PDF document text
    • http://vowonedof.epizy.com/kiran_publication_bank_math_book.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_off0000ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 6228 bytes
SHA-256: 737b9e8562b3cd4bc3276554ab2568fa0dd358cc049fc4cf664e583c1a6958f1
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10980 bytes
SHA-256: 94768a4932a0c79a5361eb34016af837f4213d002237eb9532690be888bd9ce7

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