Malicious PDF — malware analysis report

Static analysis result for SHA-256 63681bffe2bdd0c4…

MALICIOUS

PDF

89.5 KB Created: 2021-05-09 20:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 974e831edd4fa9247d6ecd98a5257b19 SHA-1: ba8f6e877189297a41c09f157fb6ebceaa756c12 SHA-256: 63681bffe2bdd0c473b14c828bc93c92617337c4b7322c3b1784100bb922d02f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, with a specific detection name indicating it is a phishing trojan. The embedded URL points to a suspicious domain, and the document body, though partially corrupted, contains keywords related to a product, suggesting a lure for a phishing or malware delivery attempt. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate the presence of external links.

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://resalured.ru/strik?utm_term=bissell+powerforce+helix+bagless+upright+vacuum+2191u+target PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369333/normal_6011a6a4d8c53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_600388f221f92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fca207d8e87e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5fff354ceac7f.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/jaAjbZc/36169044028.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/sghfhcs/31224773032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5fe54c9bd8e77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5ffbc052a883b.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/8hgidwj/regular_english_speaking_words_daily_use.pdfIn PDF document text
    • http://ourfanz.com/lusaw1na9r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_602c619f577ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_6043e505a7dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_6042e69b6699e.pdfIn PDF document text
    • http://smotrikino.fun/human_heart_drawing_simple_step_by_stepf8fir.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/OheggdJ/totelubolu.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/senodiw/how_to_become_a_foster_care_social_worker.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/20807553705.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/66515543629.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/14994483413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a8eca8-8129-4a72-81f6-cc2300433a56/pokemon_red_map_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a0fbca-97c6-4307-8985-e8b73365d818/medazitebosuxuwux.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/53875520561.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_off00011d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3C 6176 bytes
SHA-256: 3025ec20fcfaa1c9136a921ed43a4c5ce64fb1941c2b76a9554ab7dae05ceedc
font_01_sfnt_off0001323f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323F 11140 bytes
SHA-256: b304a972886eaffb08843271a3e57ca6965607fb4b1d77e000b506a9026f3a60

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