Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0dca7c244ff34c…

MALICIOUS

PDF

33.3 KB Created: 2020-03-28 10:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16d8a2b9307410f6418a275794a31746 SHA-1: dd5c9abab598ffce7cb4b229bc28a1a33097b27b SHA-256: cc0dca7c244ff34cb38505e749ab90b228fcff787bed1ce7974c525feb5fcc0c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a coordinated effort to distribute content across many domains, likely for SEO manipulation or to host further malicious payloads.

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://gloriastory.com/uploads/1/3/1/4/131406797/131406797.html#persian+title+of+respect+crossword
    • http://promelanininc.com/uploads/1/3/0/6/130640020/4398143.pdf
    • http://btravels.co.za/uploads/1/3/0/4/130436165/c7a106df9e2b041.pdf
    • http://inspiredobsessions.com/uploads/1/3/0/4/130483409/baduxibuz.pdf
    • http://www.plussizeweddingdressny.com/uploads/1/3/1/1/131164131/1869351.pdf
    • http://nicolevettraino.com/uploads/1/3/0/6/130621856/fomunazoxig-vasubeki-xepamixig-zowafido.pdf
    • http://20sprints.com/uploads/1/3/0/6/130621665/tobobamuk_kawagani_poguxazeke.pdf
    • http://roman-engineering.com/uploads/1/3/0/8/130874213/luleputoguravel.pdf
    • http://jerrytan.xyz/uploads/1/3/0/6/130639335/lufesat.pdf
    • http://collinsconcepts.net/uploads/1/3/0/6/130621025/zawiratorovawirifeso.pdf
    • http://feast512.com/uploads/1/3/0/4/130488701/7a6c560a43.pdf
    • http://my-pmc.net/uploads/1/3/0/3/130313180/wipupozevu_sewipo.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_off00005af6.bin
52b2c4b94bc63ef98d64a0ec730c3ffe6d650ee9e10702c78d62e3299144e1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF6 7564 bytes

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