Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa66772d5952c8a…

MALICIOUS

PDF

119.8 KB Created: 2021-04-02 18:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fe1b9dc78c5ddf12e117074bce98c390 SHA-1: 69c200e02ee4c2bfe46afbda929ed093dbc08fa2 SHA-256: 7fa66772d5952c8a2964768ee86f1d372d728bf16672a38ca0f43ae04697f1a4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious external resource, consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=tablas+y+calendarios+el+universo+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467036/normal_6018537d497aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_604512f18dc2d.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/e7273.pdfIn PDF document text
    • http://springital.fun/function_and_relation_mapping_worksheet67wny.pdfIn PDF document text
    • http://wordsidepost.top/5718123283u4hrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_603fd0620c286.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/gIuBgi1/wegux.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/YhhEpVy/kof_98_um_ol_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/0ghU8pL/96173815774.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/89807805b6ad3a.pdfIn PDF document text
    • http://civiliscmq.online/34592150637fvgig.pdfIn PDF document text
    • http://autobuff.xyz/896843831519rkba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_600b19e221882.pdfIn PDF document text
    • http://tegor.xyz/what_are_the_8_logical_fallaciesz0w14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_600481b689a9e.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/31a82a26-4497-4c73-95b6-f85902ee7218/51566046473.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/45913312483.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/optimization_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/captain_marvel_official_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee4bdfb-0144-47b5-abcc-b2df0c4cb21a/xisiwep.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/podaperifujid.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/graveside_funeral_service_template.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_off000191f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191F3 5456 bytes
SHA-256: f2b6538e4233042c06e984d80fc4310ebb0fc2ccb7f58415618987debc92e50f
font_01_sfnt_off0001a494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A494 13228 bytes
SHA-256: 93c59396932c7648dd86f0151b4822e1d6c83d1854334b1ae06fc6eccb04c0b7

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