Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3a47fcd5a3bba0…

MALICIOUS

PDF

38.7 KB Created: 2020-03-24 01:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 26f4085fbe40275dda38aa2755bf5da1 SHA-1: 902d9f1506a54ab2ec3a9c1d65c390171035d7ce SHA-256: 3d3a47fcd5a3bba02d2b5212a54952af6d38a3f4845257312c655028210cab5c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files across multiple domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a reference to 'the outsiders study guide questions chapters 7-9' and includes several of the identified malicious URLs, suggesting a lure to external content.

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://thebusinesstip.com/uploads/1/3/0/3/130324011/130324011.html#the+outsiders+study+guide+questions+chapters+7-9
    • http://midentistadepuebla.com/uploads/1/3/0/6/130621374/lemipudupedowanoke.pdf
    • http://meyersforassembly.org/uploads/1/3/0/6/130620651/4c3be7ca2.pdf
    • http://www.sochicompany.com/uploads/1/3/0/5/130588937/a34ea5.pdf
    • http://livastra.nl/uploads/1/3/0/5/130551000/furuwotelibukalokejo.pdf
    • http://plumandmoss.com/uploads/1/3/0/7/130775641/potimitabav.pdf
    • http://columbiacommunications.net/uploads/1/3/0/6/130603956/baxegufulexajiv.pdf
    • http://glendaletkd.com/uploads/1/3/0/8/130814246/ranoza.pdf
    • http://womensfirstweekendclub.com/uploads/1/3/0/4/130483132/dddb0c63.pdf
    • http://avatarflux.com/uploads/1/3/0/4/130476004/eadd515.pdf
    • http://wesellatx.com/uploads/1/3/0/2/130270956/jemuzorerikife.pdf
    • http://mihipotecaresidencial.com/uploads/1/3/0/8/130814591/74d83e.pdf
    • http://iotproducts.info/uploads/1/3/0/2/130289235/3621095.pdf
    • http://www.justforhimm.org/uploads/1/3/0/2/130272428/sijiwabuzaxab_kodebasofo.pdf
    • http://boujeebbeauty.com/uploads/1/3/0/8/130874482/d76c5af.pdf
    • http://otisladybug.com/uploads/1/3/0/5/130545011/tipotujuzal-sokazel.pdf
    • http://fun2gotravel.voyagerwebsites.com/uploads/1/3/0/2/130270869/4886914.pdf
    • http://www.scalespace.net/uploads/1/3/0/7/130776714/vinowalerimotu-jegadulazijoja-tetof.pdf
    • http://www.getdrparts.com/uploads/1/3/0/3/130379634/e4bf3ab07b51.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_off00006eb5.bin
f4437674aff18cac6ceedf25bd675010e30ab27f7b5eaefb3f16e6fee256cb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB5 7536 bytes

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