Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33b7e0d8ad013a8…

MALICIOUS

PDF

38.6 KB Created: 2020-11-09 02:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f6a4d2d98a739af1b431de3b162fe4f5 SHA-1: 9fefc2ed1a0c3eea06163ea7c33ffb152f2eeaaf SHA-256: b33b7e0d8ad013a86699e4e84a08ecf1464eb6463373d56eefb4ef69cba3dd19
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/aws?keyword=desert+ridge+academy+ca PDF link annotation
    • https://rumorima.weebly.com/uploads/1/3/4/3/134307849/sagorepewuro.pdfIn PDF document text
    • https://gevotasi.weebly.com/uploads/1/3/4/3/134389209/72dee2.pdfIn PDF document text
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/zibiwit-fepoxulalunu.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/1933773.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/zojakamaro_gabekubux_vidodix_rozadopodul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bakazowoti.files.wordpress.com/2020/11/tolabotimigowesotarereda.pdfIn PDF document text
    • https://redasiwum.files.wordpress.com/2020/11/poredumevimuz.pdfIn PDF document text
    • https://jogamoje.files.wordpress.com/2020/11/89911153516.pdfIn PDF document text
    • https://vuduripej.files.wordpress.com/2020/11/move_outlook_imap_data_file.pdfIn PDF document text
    • https://puraduj.files.wordpress.com/2020/11/gizelewuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d027398c-a39d-463a-93e1-37b74e807533/10593076859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f06b8d9-9a48-4181-8360-ce99ed054116/lego_remote_control_car_app.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_off000057dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DD 5328 bytes
SHA-256: 103f6d9671bc035fcb2e9e9c7c7dc388089117420251b23d9561e949625a7836
font_01_sfnt_off000069f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F4 10524 bytes
SHA-256: ad0a4590edd64aaacba2f39e328607af90b63dfb0cc08bca7fc7a8abc27ec508

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