Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f14053a550b7664…

MALICIOUS

PDF

69.4 KB Created: 2020-12-03 09:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d73f97f7fdf619f7f7bab08f9e8beb8 SHA-1: 59c50e717db81dcb5390b5b062cce098d5d7368b SHA-256: 2f14053a550b766408c77f53b40d044e51d5dcd19d912b0bdfdf005327185534
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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the presence of a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the document's structure and embedded links point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=children%2527s+story+pdf+download
    • https://bujopovuw.weebly.com/uploads/1/3/4/3/134390204/4379306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc36737bdb33045eed226b2/t/5fc83636f97c193540e71f76/1606956600310/artillery_fungus_clorox_wipes.pdf
    • https://static1.squarespace.com/static/5fc0f27ea13a450babf44921/t/5fc2f2c1f3de5e49b5c5c22a/1606611650574/finegujafabezo.pdf
    • https://static1.squarespace.com/static/5fc50f372e537a05ef23cbd8/t/5fc68c03fa04221c71042cf8/1606847492128/national_defence_academy_coaching_classes_in_mumbai.pdf
    • https://static1.squarespace.com/static/5fc2814bab79f442f233bc55/t/5fc3909de18c5c478e697a57/1606652061995/google_play_refund_trick_2018.pdf
    • https://s3.amazonaws.com/pazifetanegapu/definitions_of_curriculum.pdf
    • https://static1.squarespace.com/static/5fc0c303a13a450babf35031/t/5fc224131972c46e3ce70f86/1606558739843/chapter_summary_worksheet.pdf
    • https://s3.amazonaws.com/pisedij/mt_vernon_illinois.pdf
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc2b74bcb3e0f5771a9772a/1606596435676/vajewamewi.pdf
    • https://s3.amazonaws.com/xezujuxoz/epic_games_launcher_fortnite_battle_royale.pdf
    • https://s3.amazonaws.com/xakapudakadu/6516633648.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d297.bin
a72e268aa59a50a0a6e3824a1895c193863077659590371791f893a904fd2561		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 5264 bytes
font_01_sfnt_off0000e48e.bin
325e610c50e5e1f276646e2a24e4ade140d2877a0a4a289e733f784ef3a9daba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 10108 bytes

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