Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ba110411bd79ee…

MALICIOUS

PDF

40.4 KB Created: 2020-03-14 23:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6a09c05023f726c1de4516ade4d2f89 SHA-1: 72998e459206a96a0391ac3be4eefa9ed2110f9b SHA-256: b2ba110411bd79eeb667e22e2e771188939577066bbf1956e08cf4498910191b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm for SEO or malware distribution. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Cccam' and software versions, likely serving as a lure to encourage users to click on the embedded malicious links.

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://cvayn.bpmtc.com/uploads/1/3/0/5/130539645/130539645.html#cccam+2.+3.+8+vti
    • http://fretbuzz.info/uploads/1/3/0/3/130323162/ragiv.pdf
    • http://archerypartyhouston.com/uploads/1/3/0/7/130776421/temego.pdf
    • http://www.globalfamilyenterpriseadvisors.com/uploads/1/3/0/4/130488885/390443a90.pdf
    • http://kpvirtualsolutions.com/uploads/1/3/0/5/130543684/5606182.pdf
    • http://hildegeuens.com/uploads/1/3/0/2/130287890/6724247.pdf
    • http://mobilemuttsrescue.com/uploads/1/3/0/8/130814229/352a7511ab9d5c.pdf
    • http://pluhkeeart.com/uploads/1/3/0/4/130435680/bijinamikojobonijeg.pdf
    • http://charleschien.com/uploads/1/3/0/6/130639815/pirukofakobojum.pdf
    • http://pranksulting.club/uploads/1/3/0/6/130604153/vugubasolid-zekula-jefozu.pdf
    • http://webdisk.happymamawellness.com/uploads/1/3/0/8/130813722/178040d04.pdf
    • http://smartwatch.co.uk/uploads/1/3/0/4/130488975/2b8a96c319.pdf
    • http://briannasmith.us/uploads/1/3/0/6/130639865/gufejivalesesek.pdf
    • http://tetracapital.net/uploads/1/3/0/5/130588477/d82818768d.pdf
    • http://www.newcenturyplayers.com/uploads/1/3/0/6/130639133/gamoxerima-figejosof-satutux.pdf
    • http://mitefnw.org/uploads/1/3/0/5/130588473/a3e81720.pdf
    • http://operantsolar.com/uploads/1/3/0/6/130622075/2ce28.pdf
    • http://timmahekdds.com/uploads/1/3/0/6/130605509/pebomoxof.pdf
    • http://beachhousedestin.net/uploads/1/3/0/5/130590143/lirigagudet.pdf
    • http://www.cecmllc.com/uploads/1/3/0/9/130969599/palosi.pdf
    • http://briannasmith.us/uploads/1/3/0/6/1
    • 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_off00007454.bin
bace084e4a78eede6bac368d8e36bfe9b1315c6713e9536686d6f21ece80eb64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 8256 bytes

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