Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ce4866a626287c…

MALICIOUS

PDF

65.8 KB Created: 2020-12-10 11:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 31a612094b935b97fefe1d0c6ed0b15f SHA-1: 0364defb67b68380cfb16722a218f64fddc3cd04 SHA-256: 44ce4866a626287cf109d1644a788905ef4ee62fcad7dedaeb4bfd9d01fe50fd
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily obfuscated, contains references to '3 man spades' and appears to be generated by wkhtmltopdf, suggesting a potential lure or context for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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://cctraff.ru/strik?utm_term=3+man+spades In PDF document text
    • https://xokapajutubesa.weebly.com/uploads/1/3/4/7/134730315/simozofonugupos_xegebitovumuvu_warigavitupoxa_kugugarovatopa.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/bivanuzewagofivopeso.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/3951676.pdfIn PDF document text
    • https://dufanidozit.weebly.com/uploads/1/3/4/7/134764520/dujunaxiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5636c5687f52b6b9f32bc/t/5fc679687acac6192aa20f7d/1606842729224/14829920219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba38b914-a3cd-4761-a0c4-60e769f51fc2/fobubuduri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ca29ee0f32b8749f73a/1606372515364/fur_elise_piano_easy_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867a5b2b-df7e-453c-aef2-84df0be77333/wizkid_dont_tell_em_mp3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf2acca633b27d3ae71603/t/5fd17d0ece71ee580fa1b695/1607564558761/48850148161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94da87f-6335-495d-93bf-ca9ae4abda13/23905321493.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/verizon_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/zefiwabozuge.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_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5044 bytes
SHA-256: f7e3986d7e60b52f5a9b708510f20f2eee7055981e85c7dfeb3202e7083fecab
font_01_sfnt_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 9844 bytes
SHA-256: 9e8d25abc309ac0c30297de995ebf4bf76d561578ba1a4b7c2142b81319decab

Open this report in the interactive analyzer, or submit your own file for analysis.