Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abe99f26e3ae7e8…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 22:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f9fc45d3e3a41bb6c8c6e2a9b66ee135 SHA-1: c7b4fbd502a0503ab6a111d01ef1788c8156ebac SHA-256: 2abe99f26e3ae7e8560d12475d794458ccd4e259bb23d38ad76983f8225dc93b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=vtech+cs6124+user+manual PDF link annotation
    • https://cdn.sqhk.co/xokekekav/fA35VSJ/2815077202.pdfIn PDF document text
    • https://galojonebe.weebly.com/uploads/1/3/4/3/134353990/zixukirugowapotibuj.pdfIn PDF document text
    • https://jubitire.weebly.com/uploads/1/3/4/0/134017652/zixejuximoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/XQtjaba/perfect_world_mobile_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nitumatemi/hi3ijij/86726651106.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/cDraJ53/xmas_word_search_christmas_cookies_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/ighhRid/68771994797.pdfIn PDF document text
    • https://cdn.sqhk.co/lixepupo/ijcHr47/pepedaragiwixa.pdfIn PDF document text
    • http://kexawez.mygamesonline.org/alfabeto_japones_katakana_completo.pdfIn PDF document text
    • https://semoburepov.weebly.com/uploads/1/3/2/8/132815840/3250486.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/2008_jeep_wrangler_unlimited_x_axle_ratio.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/jbr7kja/dijukaguf.pdfIn PDF document text
    • https://bipagaposelugi.weebly.com/uploads/1/3/4/4/134479594/sibokixuvadivovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_e3544dac00e44542aa5922a6b2a253d8.pdf?index=trueIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/kobagozexamit.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_61484ea46e554528a4e7c492a9fe0195.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_b419b5708a804a9d828c493a890e58d1.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_17f7324be4c64e1f91b5e3e463fef07e.pdf?index=trueIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_27f4a35771f0447dbb2088a7dc24e06c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 5428 bytes
SHA-256: 88520b1ec5ad582506e33643b01c5b9d7890b1df15908f7d4c64537bcc64a71c
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 11032 bytes
SHA-256: 108dde904bd64e4ca1b300bcdfaa54b4c9225143f4975c6782716ac0f1826fa2

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