Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7b8575a629203f…

MALICIOUS

PDF

38.4 KB Created: 2020-04-13 04:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 366e485241b88638e2b73ff31ed05e3e SHA-1: 7d95c584f366866df1e61e7c9869cde1ccdd636d SHA-256: 0a7b8575a629203ff244b27ab67f40a0313cc032a5a35e9ef509b8ad4ee79c6d
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, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. The document body, though partially obfuscated, contains a URL that appears to be part of this link farm.

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://godspeedmagazine.net/uploads/1/3/0/3/130323199/130323199.html#papa+murphy%27s+cooking+instructions+pizza
    • http://usseawolf.com/uploads/1/3/1/4/131437544/3477922.pdf
    • http://thetruthaboutbellinghambaptistchurch.net/uploads/1/3/1/4/131409037/rasetolo.pdf
    • http://dubaidesignsprint.com/uploads/1/3/0/6/130604907/gixogawo.pdf
    • http://newseedscenter.com/uploads/1/3/1/3/131381088/1031469.pdf
    • http://godscreationsjewelers.co/uploads/1/3/0/7/130739001/9ddb0afd.pdf
    • http://ivanecuadorclothingcatalog.com/uploads/1/3/0/4/130483263/84c788c5a.pdf
    • http://southerncreativedesignsbyerin.com/uploads/1/3/0/7/130740427/5849004.pdf
    • http://springroofers.net/uploads/1/3/1/4/131453048/6611553.pdf
    • http://opalmedics.com/uploads/1/3/0/7/130738487/xofozozuzoze_nozepex_xewakuvolejoxem.pdf
    • http://mycompanyapp.com.au/uploads/1/3/0/8/130814232/2175439.pdf
    • http://shuckincrewsensationstraining.com/uploads/1/3/1/4/131438353/13e83f.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_off00006be5.bin
4175f37c3b4f11ee1cce606c82791348a4ed68a0c4d635593b97c30ef1980617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 8164 bytes

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