Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5aa2e40c08b3b7a…

MALICIOUS

PDF

70.0 KB Created: 2021-03-07 22:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6fa10d7953771bc743cf6cd16e89c2f3 SHA-1: 5eca720cd949d88b2ca05b546f7a62b4ebea86cd SHA-256: d5aa2e40c08b3b7ac0a5cc6fd00171d82ca497d06c04a56023f15f6158f2b293
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, with one specifically identified as a link farm, suggesting a phishing or SEO manipulation tactic. The presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/aws?utm_term=how+to+clean+filters+on+dyson+vacuum PDF link annotation
    • https://cdn.sqhk.co/lupokuna/lvIhhhj/injustice_gods_among_us_mobile_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/bVBjjic/all_slots_casino_real_money.pdfIn PDF document text
    • https://rakonudiboxenej.weebly.com/uploads/1/3/4/8/134874851/worevirom_mumiroz.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/WctqibT/muzef.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/tobafiledibufo_toxomanut.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/diwikiru-sejutun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1277f4-1e1f-4e33-8662-ea6c5608c24d/what_are_the_biblical_benefits_of_giving.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_d353183251304dbcbd8ef835fdd1f31c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd3f5bb-02ac-43d3-b51a-6d3ad5cd7893/breville_juice_fountain_cold_press_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/jefosekerepuligusu.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/90315657566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bcdf9d-dd33-47e1-af19-2b2f5acaa022/how_to_replace_a_microwave_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd2c61c-3b24-493f-926a-368b2f89de9f/anker_a7726_pin_number.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/bollywood_movies_2014_full_movie.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_3d16e5647811471c84eb7d2272d2f22a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/fadapa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/rayagada_autonomous_college_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/12th_marksheet_online_2018.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 5380 bytes
SHA-256: 263d1b5aa4cb5fcb5f889082c6e460b7cd4095f5f758c7340517727b37f4f888
font_01_sfnt_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 10044 bytes
SHA-256: 49a1d49fb5f668cfcd4302a46c2067eff9ca3393db14df94797af84191512831

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