Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69c4f91f021c942…

MALICIOUS

PDF

76.0 KB Created: 2021-04-24 10:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 779ca850100c400ee58ce488197da279 SHA-1: 27707de41c0629f9cbd514b60110d962b164e3a3 SHA-256: f69c4f91f021c9421a77f325676becead0a784f234ed505d6756b40ba3996c78
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, with a primary focus on a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

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://soxebez.ru/strik?utm_term=photoshop+7.0+shortcut+keys+pdf+download PDF link annotation
    • http://1ux.site/buluxafumugitenumagibetooacnc.pdfIn PDF document text
    • http://mebelintera.ru/7761650223614ziz.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/iz8eyhb/abcya_games_for_kids.pdfIn PDF document text
    • http://afracheat9.xyz/reditotkk7l.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/evhe500/hitman_movie_2015_in_tamil_dubbed.pdfIn PDF document text
    • http://gibejujefuguxax.22web.org/68018890784.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/predator_generator_reviews_8750c4jzt.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/zaxefemebidaz/davesiduzeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06612009-55f0-4a73-ae98-13bbd481cf91/gemidesebav.pdfIn PDF document text
    • http://moxutomib.rf.gd/ibps_clerk_2018_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ff75f7-ff61-4b19-bd6a-623af0eb3ecf/how_to_do_low_carb_not_keto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefc53c6-2435-4b4f-9fe6-de27bc94fb1a/oreck_proshield_air_purifier_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/inventions_esl_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282dc3ae-faa0-4e72-a015-11f632db531d/is_the_total_gym_worth_buying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f8d10e-d02e-45ab-b911-50479c8d8e8f/39285783631.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_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 5756 bytes
SHA-256: 0c590faa8f91006f44dfa27d8e94e04c5eefbaa55219d7bdd496b73c4831ec2f
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 10096 bytes
SHA-256: 91663bc053c7c0db4405a1aca3e4ed8dd42f5a272deba06b3289029e3bb2bdc1

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