Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0edb2551b625fd…

MALICIOUS

PDF

84.0 KB Created: 2021-02-08 20:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c4d4fb87167f121200bb62d3e1f37231 SHA-1: 7a06c489b1b798de154f02b20e8095b157c67bbc SHA-256: ab0edb2551b625fd73ebe89848b136c955bc48b02620f8ac98860690b802e23e
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'aabb guidelines for blood donors'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=aabb%20guidelines%20for%20blood%20donors PDF link annotation
    • https://cdn.sqhk.co/mupalewefe/Lsjb5gg/brick_breaker_burning_ball_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/iilohgb/74515122143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_601b4e590bfe4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5fcf677535978.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/Ajhxh9Q/map_of_countries_uk_has_not_invaded.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_600387be33558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501198/normal_5fdefba0d7331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501634/normal_6001e17dcea7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_601b717b9404f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_6007db8fdc261.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/R4ZB1NW/39461927835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_5fe197494ea70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_5fd3bf2bb8d37.pdfIn PDF document text
    • https://cdn.sqhk.co/texonatuzi/gfSghih/19460239141.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/gcjegcS/incrementalism_vs_revolution.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/jbnijib/89927607355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 5008 bytes
SHA-256: 7a4c0f4b55c35406fe37615d877dec3d2c228568da2421f769d5df4720d18afa
font_01_sfnt_off00010f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 11072 bytes
SHA-256: 9f9293c8b7b1491118468d04b2515c9ba5dbcce7688997c61684806833fb7cec
font_02_sfnt_off0001349a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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