Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a692e42fd37ec57…

MALICIOUS

PDF

79.0 KB Created: 2021-03-22 01:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4158f7f775c69c915847a4feb0a82575 SHA-1: b43a8aaa6a00dff5a909709a653e6b842ff81b61 SHA-256: 6a692e42fd37ec57963ac075203cb9eca93dc8cff28b82a19777a3959a424153
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which point to SEO-optimized domains designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically flags an image lure leading to an SEO redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=cartoon+video+song+malayalam+free PDF link annotation
    • http://pshcomonhere.xyz/gmat_official_verbal_guide_2018xejkp.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/52783097179.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5ff5fb734b6c0.pdfIn PDF document text
    • http://walletelectrum.buzz/34791481014pvuvo.pdfIn PDF document text
    • http://parkingtest.xyz/fingerprints_of_the_gods_the_quest_continues64a0f.pdfIn PDF document text
    • http://lunesygets.xyz/what_causes_surface_ocean_currents_to_be_deflected6d2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_602d8a7a414dc.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/environmental_safety_and_health_engineer_lockheed_martin_salary.pdfIn PDF document text
    • http://lady-bug.club/laxadutubudipefitadumaj1dfb.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/megulu/438239408.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/56788930442.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_a6d9c566d759488d8d3868f0c694446f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/best_mysql_books_for_beginners.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_1a381acba02f42a2814d3ad7296c8725.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/formato_de_balanced_scorecard.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/coreldraw_18_free_trial_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/free_powerpoint_template_medical_heart.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 7

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_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 5292 bytes
SHA-256: 508f2a25bb129dfc48dc726912821a3bf409767c23f892f04ecc9cf7b40be93b
font_01_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 11588 bytes
SHA-256: 6a450ecc376a960bd6ac559f41e866d2548cd2f6d181cd10ed767eaccf02648a

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