Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028a35e8a41c7c7…

MALICIOUS

PDF

108.5 KB Created: 2021-03-27 23:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8d4032eb78aaf43135058d95bd71e479 SHA-1: 6289c9d68440b16a7d8bdbeee5cd12d7a8680b91 SHA-256: 3028a35e8a41c7c7ab8de318aaeb9d49d864c1eb4f60463364f194c3f5641882
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms. The primary URL points to a keyword-based search result, suggesting a phishing or spamming lure. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely designed to redirect users to malicious content or download further payloads.

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 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.
  • 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://gimoguvi.ru/wix?keyword=greco+roman+culture+in+constantinople PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379971/normal_601b7f45f21a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_5feb4612134d8.pdfIn PDF document text
    • https://pukukadusese.weebly.com/uploads/1/3/4/6/134666137/f5fbb6ced265a.pdfIn PDF document text
    • http://lojotiwutorolad.22web.org/85999570952.pdfIn PDF document text
    • https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/b63b50aeb4.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/dobikasukavu/83875252009.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/repozopidigetagagub.pdfIn PDF document text
    • http://buluzapatevade.epizy.com/practical_vapour_absorption_refrigeration_system.pdfIn PDF document text
    • http://punolubumima.epizy.com/birth_plan_template_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/french_present_tense_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0ff5b8-a27a-4517-a994-9137fe69ffbb/mafisurafonexifex.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/fefusik.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/95528244827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b31105-8758-4c76-99d7-1591d6c77994/alaska_drivers_manual_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/mefokep.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6D 5108 bytes
SHA-256: 0a7847ad5bf26993c4bdd21f59ea7eceba5ea234120d50b1936399d490133768
font_01_sfnt_off00017fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FB4 11296 bytes
SHA-256: a195386dd68ab029bea016f160a4f03c2317c058baf54b7f9164a23a532039b8

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