Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bb9b7311c6e53a…

MALICIOUS

PDF

39.8 KB Created: 2020-03-29 07:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2c4bd84b46f360cb3b2df846f1e69d4 SHA-1: 6c1a96f0ec1f2611083edc853839419048591903 SHA-256: 03bb9b7311c6e53aa2a8aacdd24f29a0711bf7e5a5f2fb5057cfb1fa551968ff
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating a link farm or SEO manipulation tactic. The embedded URLs point to various domains hosting PDF files, suggesting a potential distribution mechanism for further malicious content or phishing attempts. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://74-123-73-159.mgwnet.com/uploads/1/3/0/4/130476079/130476079.html#para+que+sirve+clindamicina+300+mg
    • http://massagedbymig.com/uploads/1/3/0/6/130605263/6183583.pdf
    • http://www.shanepaulodoherty.com/uploads/1/3/0/2/130270923/xirukowagidi.pdf
    • http://snapsparklepop.shop/uploads/1/3/0/2/130274376/dbd49c38ad9f.pdf
    • http://joealford.com/uploads/1/3/0/4/130490808/f40f6425cc86068.pdf
    • http://adalaura.com/uploads/1/3/0/6/130620431/c49aaff.pdf
    • http://shipfree.me/uploads/1/3/0/5/130589145/voluxaruzodagemut.pdf
    • http://www.themobilestorage.com/uploads/1/3/0/7/130739864/1900210.pdf
    • http://charmedave.com/uploads/1/3/0/7/130775189/9773164.pdf
    • http://octagonconstructioncorp.com/uploads/1/3/0/4/130477839/e7da7b.pdf
    • http://nosquito.de/uploads/1/3/0/2/130272501/00b0c559e.pdf
    • http://pwrpitching.com/uploads/1/3/0/7/130775474/1473429.pdf
    • http://midwestcraftshow.com/uploads/1/3/0/5/130543368/459d7b23530f5.pdf
    • http://campcees.com/uploads/1/3/0/4/130435588/4c5126162.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_off00007061.bin
af0e92a11094bf2e63f2696faaf35ba6305ce28535b1a4e783d1742093e95538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 9468 bytes

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