Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d4c11ecf28ad47…

MALICIOUS

PDF

43.7 KB Created: 2020-05-17 11:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7db2de86f676a9060169e8e6a3fcca SHA-1: 20d693e55db869560e42e8df30f1f1f7040e80ca SHA-256: b0d4c11ecf28ad471a36717163b2c2600b256cd1282bd7ecfee2812688c6a374
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 domains. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs suggest a link farm or redirection scheme, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8263164-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8263164-0
  • 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://pencilpenservices.com/uploads/1/3/0/7/130775274/130775274.html#texas+commercial+motor+vehicle+drivers+handbook+answers
    • http://pferdeheiler.eu/uploads/1/3/1/4/131452732/tajudo_rodakul.pdf
    • http://melindaj.com/uploads/1/3/0/7/130740610/siwimugutibakav.pdf
    • http://htlpartners.com/uploads/1/3/0/7/130774965/doturaji.pdf
    • http://pvoxxhelp.org/uploads/1/3/1/4/131483031/7616091.pdf
    • http://holistichealingpractices.com/uploads/1/3/0/8/130874540/fexitafupe.pdf
    • http://shorelineartspace.com/uploads/1/3/1/8/131871856/jopuwux_vaxajeraxotafos_fosixabij_kitideju.pdf
    • http://ecommercesuppliernetwork.org/uploads/1/3/0/6/130620217/gogagus_kiwivodo.pdf
    • http://drhassall.com/uploads/1/3/0/2/130288379/8895048.pdf
    • http://lilbitofthisandthatstore.net/uploads/1/3/0/2/130288510/juwubapafopepes-jemev-sesetobinu.pdf
    • http://parkerdancecompany.net/uploads/1/3/0/6/130621058/5294131.pdf
    • http://leadershiphypnosis.net/uploads/1/3/1/4/131453522/bipezamubasoget_dimoro.pdf
    • http://imogenoreilly.com/uploads/1/3/1/0/131069968/725be4fb22cdbed.pdf
    • http://justyourwayprints.com/uploads/1/3/0/6/130604986/190577.pdf
    • http://valeriefong.com/uploads/1/3/1/4/131407552/peniposasin.pdf
    • http://ajantafoods.com/uploads/1/3/0/5/130588811/gidukegokomabejife.pdf
    • http://homeownersplumbingacademy.com/uploads/1/3/0/6/130622104/7584cc9250a5444.pdf
    • http://homescomingsoonindublinranch.com/uploads/1/3/0/3/130313056/ninovosuzu_gaxubijuxasoxot.pdf
    • http://minibitedelights.com/uploads/1/3/0/5/130590420/jasokatok.pdf
    • http://gozoguide.com/uploads/1/3/1/8/131872178/pasoguwedasubanubu.pdf
    • http://hosemonkey.net/uploads/1/3/0/3/130379740/b52de631776c8.pdf
    • http://redibargains.com/uploads/1/3/1/6/131637178/jijapusedaj-tigeropik-subifex.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_off00007e01.bin
c24462dbc707378d4986fa58275968d9842d06964dda76b66e363fab54c68899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E01 10756 bytes

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