Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebd1b03776db765…

MALICIOUS

PDF

102.3 KB Created: 2021-02-12 05:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2157ba5588d336b4e3296910a68081eb SHA-1: 6474dff4af94bb00e99e857611143138f2b499d0 SHA-256: 6ebd1b03776db76504db21ae9459845380ea9b1735a566b1a95039b3f0ed5ffd
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

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
  • 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.
  • 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://crophysi.ru/123?utm_term=creating+the+constitution+crossword+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_5fd76e9c6ed42.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/diSrggd/rainway_app_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_601b67c5a84ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6019c787b2f22.pdfIn PDF document text
    • https://cdn.sqhk.co/vakiduju/ljgF9Ak/paberoleburodagutaxuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6013aff6700d1.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/dQ2VIic/paxorapebevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fd932690a530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5fed1e20921d0.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/levovod/29432722262.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/states_of_matter_phet_simulation_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/kufukijafodaritos.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/50299303020.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/okcupid_dating_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/poferab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD2 3628 bytes
SHA-256: 97d5baf09c9cb944145ca4a6bb6200752531430cb41370ca309fc97fad974bd6
font_01_sfnt_off000147b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B8 5164 bytes
SHA-256: fb503b87e44fd8b7ad6894e582c5fac622a5cfad2f3d553e8705e9edcf4219d0
font_02_sfnt_off0001594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594F 16292 bytes
SHA-256: fcaa24e5638d40211c85476fdc9438f8a48a3760e380690eaf4afc0b772e3f12

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