Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec3b0e2adabbce4…

MALICIOUS

PDF

39.6 KB Created: 2020-04-10 17:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3cf9f61f808b3dd3b6a2fe963d39637a SHA-1: 6ff63031a263765e81849121096ed5815c1f7793 SHA-256: 6ec3b0e2adabbce49fee81d8ac4e0e6e67d8d1c4fcfe30438a1447c13578f8a8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or content distribution scheme. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external URLs suggests an attempt to direct users to potentially harmful content or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://adoptme.info/uploads/1/3/0/4/130489909/130489909.html#columbo+make+me+a+perfect+murder
    • http://vanessalara19.com/uploads/1/3/0/7/130740235/gowezevolo_pobakabidowese.pdf
    • http://invisionwellness.com/uploads/1/3/0/6/130620635/zuzuzivoni_xemotagina_bisebaturozev.pdf
    • http://1972mhs.ca/uploads/1/3/0/7/130775748/sunal_famubitajopevu.pdf
    • http://bidsaz.com/uploads/1/3/0/8/130814966/28e1a5eb9573ec8.pdf
    • http://ronanlawgroup.com/uploads/1/3/1/4/131453543/makubenivipowenew.pdf
    • http://masterlandscaping.net/uploads/1/3/0/7/130739385/f61683a.pdf
    • http://republik-liberalis.net/uploads/1/3/0/5/130540296/gavokofuko-xuresare-newobuwedogi.pdf
    • http://avviewdroneservices.com/uploads/1/3/0/3/130379517/viwibewonagemevaju.pdf
    • http://shorse.fi/uploads/1/3/1/0/131071167/bozuj-retigufo.pdf
    • http://pizza2thepeople.com/uploads/1/3/1/4/131482946/dakepab-xolafurelomemi-zesapo.pdf
    • http://goodfriendcreative.com/uploads/1/3/0/7/130738765/9888945.pdf
    • http://surgecloud.org/uploads/1/3/0/2/130271094/pavuxowaxuvotexuz.pdf
    • http://metalock-repair.com/uploads/1/3/1/4/131407361/7677247.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007000.bin
d7bc23a7a397bae3c3b5733080743537fe9272bd2d84b740a9052aed6b73fc4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 8128 bytes

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