Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a734a39cf51c67…

MALICIOUS

PDF

76.9 KB Created: 2021-03-12 00:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9bf1d605302fd37f433315afdcdf1dda SHA-1: 10d27c41bc943925ca08d290849d576416d8973f SHA-256: 13a734a39cf51c677a4872297f139a879c1736d3be4542c9cfe0581e42705afa
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, likely intended to host malicious content or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were extracted, the presence of an external URI and the high confidence threat detections suggest a phishing or malware distribution attempt.

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://baarspo.ru/123?utm_term=iron+man+mk+50+helmet+template PDF link annotation
    • http://rowejabajusape.22web.org/why_isnt_my_canon_printer_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367633/normal_60058fd684d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_5fdb2dbe927ed.pdfIn PDF document text
    • http://wewuped.iblogger.org/jobemuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fcb275e7975e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_6044d33224439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_602d29c48fff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_600a3ceb9777b.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/27056ff0-b6a3-4645-8681-b9e847194566/59312252730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5021d988-371a-4c26-8409-100fbc0dcee3/maytag_bravos_xl_washer_loud_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9accf0e8-51b3-4585-9366-cf4c915fa369/stihl_hs45_petrol_hedge_trimmer_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b311c9a-b1b9-4970-bca8-2175524afb5a/is_the_watsons_go_to_birmingham_on_disney_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420ac0d2-7eda-4475-b5fb-d90537109141/what_to_cook_in_my_air_fryer_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/buvetewibodubekaniwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab92fd1-7889-454a-bb09-d2075b4dadcc/79100442663.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/zibimabexo.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/optiplex_7010_motherboard_diagram.pdfIn PDF document text
    • http://kugogawi.rf.gd/yamay_fitness_tracker_manual.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_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 5148 bytes
SHA-256: 758ab8d2bde8bbfa064d63b09de3369d435bc5a6da2da4fc3ee75a3490543217
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10176 bytes
SHA-256: 4da06d04c177891068d33fab224a47e149cc8619371beba7dccbe2c4109126fc

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