Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6b04c272ad4b0f…

MALICIOUS

PDF

82.4 KB Created: 2021-03-08 12:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95dbf7b7ccffd1fc78dad82d236ee215 SHA-1: 9d1fc79346194f9e9bf7d9e6a50985a4aba82f96 SHA-256: 1e6b04c272ad4b0f924f3afc221404cf8abf53cc59bc372e397d4c4709e55540
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Numerous external URLs are embedded within the document, suggesting an attempt to redirect users to potentially malicious sites for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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://golowaki.ru/wix?keyword=school+bus+images+cartoon PDF link annotation
    • https://cdn.sqhk.co/wotabefej/zehcUjg/1557249041.pdfIn PDF document text
    • http://ita-bio.space/what_is_the_alpha_bravo_charlie_alphabetkplt9.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/ebNifij/vetorurusatuzome.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/ratotaruf.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/jcogd2J/wedding_salon_2_libii_mod_apk.pdfIn PDF document text
    • http://car-test.pro/autocad_download_trial_20175wbnx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6029ddaf6edb7.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/Ciiujek/91235712769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_6028bbf524417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5fd082c6131c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448330/normal_5fd62b82476e4.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/apc_back-ups_rs_500_service_manual.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/sixenogafopoj/immunization_registry_information_system_iowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb721d51-7246-4b7a-97cd-d9294ea9cf3a/is_double_dating_good_or_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbfd644-09c8-4784-954c-df6dc9a8c431/56458753522.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/dexofawijebegukuramuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d00a25-6a6a-41b8-910f-355e18f9b516/defending_jacob_netflix_review.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/uk_work_permit_form.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 1

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_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 5340 bytes
SHA-256: 6f67112ee9948e9f02e7d6f1f58830a8ef1bb13a87d695bab481154620b3e9e5
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10392 bytes
SHA-256: b5bd75b2fd85c92dfe7b6400536c0444b435e083fa8136b267ec363b7a9b7c26
font_02_sfnt_off00012e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E29 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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