Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38a56cb859af8f3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 03:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 570daa8ddbab4f6cb6fb6e49238140e8 SHA-1: ee1363bce53c3ef1a9843519353d97bb9b06c476 SHA-256: e38a56cb859af8f3688cad313c9ab517a6fa4114aafe606057b1e43327952e68
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 0.9996

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://pelibifir.ru/wix?keyword=circle+of+sundering+master+hong+guide PDF link annotation
    • http://lnstagramcopyrightservices.org/michael_talbot_books_in_order5hdi9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5fc72a811bc7c.pdfIn PDF document text
    • http://tryraisins.pro/saporifivdd754.pdfIn PDF document text
    • http://sobakin.space/how_to_choose_a_pantone_colorego68.pdfIn PDF document text
    • http://axecheat7.xyz/what_is_the_storyline_of_the_revenant42rvk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5ff3021fd129d.pdfIn PDF document text
    • http://irisca.online/brandon_lee_death_scene_video55cd6.pdfIn PDF document text
    • http://baltika-trans.com/662587453681uoom.pdfIn PDF document text
    • http://onsideball.info/resume_template_freepikwmvif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5ffc495d03777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_6034fcca478ea.pdfIn PDF document text
    • http://naturapple.space/33488625741wnoli.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://s3.amazonaws.com/ruzaganog/25574703631.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/70149959007.pdfIn PDF document text
    • https://9aef9be9-4304-4ec6-b02b-ded1eabc5d1b.filesusr.com/ugd/a571b8_f8b39878c7d74644a614577d4336a0d2.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_b5f4ab194d754f20b91296d0fa9dcaaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovigebi/billions_season_4_episode_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e50604-f57c-491e-86cf-fc39643dac24/ingenuity_baby_swing_replacement_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/66151172800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e920931-7a77-46fc-8d60-617328082559/52789243362.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_0810c8c81ba5470891c1bdc42408833d.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 5340 bytes
SHA-256: 2de79d3ba8f1bea61d901eccbde42fbbbb2dfab2edd4a03a71b58bce5e3a10bb
font_01_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 11228 bytes
SHA-256: 49fde60c4f4a917c2d32c44ecc06fe74a3a019a98af9c38079cb3ca07491d74f
font_02_sfnt_off000124b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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