Malicious PDF — malware analysis report

Static analysis result for SHA-256 e610d4cae0414cb5…

MALICIOUS

PDF

70.7 KB Created: 2020-11-24 01:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 30fe484d69e510dfb1769aae7e296cac SHA-1: 9f2c9590bda8b00a95019a3993b19b96cde43096 SHA-256: e610d4cae0414cb569c0153ce9ee7240280abec6678ccc6fa6a91ebcba21c925
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ggtraff.ru/wb?keyword=caste%20based%20politics%20in%20india%20pdf`. This indicates a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to obscure the malicious intent. No scripts were extracted, but the PDF structure and embedded links are sufficient to classify this as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=caste%20based%20politics%20in%20india%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_5fa68348a8f19.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/konewi.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/jofunozuzof/52529066256.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/81560104851.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/kogipuxefoxizijefadalabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee27ac4d-81cd-4b64-8aad-9467f3c2fb54/cubase_7_crack_team_air.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/c_major_chord_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a41172-85ad-4ce5-b26b-c7530ba0069a/jikoridewimikikok.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/ordinal_numbers_esl_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fc3196-0f65-43f5-865c-78a1bb25ab55/love_is_a_fallacy_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/lokuxuderuvonos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6926ac0-446f-4071-b7fe-051611614ba4/wekanepokupubasebetolebow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d49b510-bb82-4495-a6ce-48515c458149/kershner_flight_instructors_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/activated_carbon_market.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/kinesiology_tape_for_runners_knee.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_off0000d92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92F 5096 bytes
SHA-256: 0968d4465e23d36df4bdd5460c5bf3f52c3a386e82dac9fa066ca41bc84c1b4c
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 10248 bytes
SHA-256: 07131a3c64be14ef6338e71bf326dc5eb1cbc48c81c288b79eed4f75c9287a3e

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