Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bbc8700110bbee…

MALICIOUS

PDF

43.9 KB Created: 2020-03-11 02:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dcff3461b5fc2952363685cbc13270b9 SHA-1: 6371e756da7fff98a2ec80dc1b12bd8a66d49cb4 SHA-256: 37bbc8700110bbee35f218d7b4b3004cd1f7b2d207469ab2225b6c00ac357116
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on SEO-optimized domains. This behavior is indicative of a link farm designed to attract traffic or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm attack pattern.

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://host193.carmichaelnl.com/uploads/1/3/0/5/130547659/130547659.html#summary+of+the+poem+afternoon+with+irish+cows
    • http://intellidocs.net/uploads/1/3/0/6/130621630/xabudimabatik.pdf
    • http://inspirednuclei.com/uploads/1/3/0/2/130273616/c25e39b012b.pdf
    • http://euro-bdf.net/uploads/1/3/0/4/130488073/sokofibelugide-bikajiwo-tesewurej.pdf
    • http://marinuskosterfoundation.org/uploads/1/3/0/6/130621569/buzuwisedobote-nosopese-lujiw.pdf
    • http://internetsmoney.net/uploads/1/3/0/5/130588168/5224360.pdf
    • http://digitalcombg.com/uploads/1/3/0/7/130775295/fisapevajire.pdf
    • http://bigbonedfitness.com/uploads/1/3/0/4/130476503/0d9dbfefda5c81.pdf
    • http://mta-sts.mx.jacksongirlssoccer.com/uploads/1/3/0/2/130271113/koxifisafixovem-xejusafunojame-riwamojovexot-jinuwafusulek.pdf
    • http://beadsbyshela.com/uploads/1/3/0/7/130739510/poripaloruzijazapuzi.pdf
    • http://robyntapley.com/uploads/1/3/0/4/130489499/zibegekok_fegamujotub_suvorugu.pdf
    • http://shutupimgay.com/uploads/1/3/0/8/130815351/nezop-zofoz-wezuro-xakuvajej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7d.bin
801e45ebf0904148eb7db503a0204ea24795139d13db12d3f5cb028798d39dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7D 7736 bytes
font_01_sfnt_off00008ba2.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 16036 bytes

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