Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa659e3c1ae5c11…

MALICIOUS

PDF

67.7 KB Created: 2020-12-10 11:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62914227941504620c2628069d258941 SHA-1: 7f99d84667f93eb6b22a1db3be393862a57fe569 SHA-256: eaa659e3c1ae5c11207ebae0d65ed6c576cbd0b2b8530e545969018a3ee4dc40
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. One of the primary URLs identified is 'https://traffking.ru/aws?utm_term=cloze+activities+printable+worksheets', which is likely part of a phishing or malware distribution campaign. The presence of a 'Download button' heuristic further supports the idea that the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=cloze+activities+printable+worksheets
    • https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/c2d7bb4215c5f4.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/9216896.pdf
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/8481052.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0187aa5bc066edfa15e28/t/5fc0db311972c46e3cbe5b67/1606474546358/who_inventor_softball.pdf
    • https://uploads.strikinglycdn.com/files/b35e4fac-45f5-4e97-b4d8-b078f41b049f/del_taco_nutrition_guide.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c2f7acac6192ab844cf/1606376495693/49460349700.pdf
    • https://static1.squarespace.com/static/5fc64b40bda9c57a97e2ea2d/t/5fcbf7c7f94b6402b2041acc/1607202759877/zibinafo.pdf
    • https://uploads.strikinglycdn.com/files/4fad18c1-4224-45f1-9dfa-a84a6c463838/89970407426.pdf
    • https://static1.squarespace.com/static/5fc6beaecb936d6a06a4c2a9/t/5fc80bb85d06c957858b4f02/1606945721514/kokarakewu.pdf
    • https://uploads.strikinglycdn.com/files/28d6da60-bff2-4c4e-825a-f741e5b2f3de/9053731008.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf5.bin
504779630c68e3e6c99990e71099c57faa8a260a5ffe095d48a670f124040c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 5332 bytes
font_01_sfnt_off0000de26.bin
4b17bb1fc680ffcd98de24b9b798abe94cfd42556a5e423ae5ea2835b5d3601b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 10488 bytes

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