Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4a9c7049e5a806…

MALICIOUS

PDF

35.4 KB Created: 2020-05-26 01:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5a56f27653a3ca68deacba50748ec71 SHA-1: c0059a9c00d6660614822f0ade2120ee8158b351 SHA-256: 2b4a9c7049e5a806af63a2e976e1aeabb28dee06f9ca55cbf1c1f7a7696da01b
94 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, a technique commonly used for SEO poisoning to lure users to malicious sites. The embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to redirect users to potentially harmful content, likely for malware distribution or phishing. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://spiceypepawear.com/uploads/1/3/0/6/130621700/130621700.html#transformers+2007+movie+download+dual+audio+720p
    • http://99high.com/uploads/1/3/0/2/130291694/folezadujo_sitemage.pdf
    • http://bellaandmay.com/uploads/1/3/0/3/130323329/3827671.pdf
    • http://washer-dryer-repair.net/uploads/1/3/0/7/130740191/7f37eac0.pdf
    • http://27e.undesirable.us/uploads/1/3/0/4/130488924/ziminozuminoz_ruxesu_tavirun_puwilovuv.pdf
    • http://carter.ventures/uploads/1/3/0/7/130740118/ritejuvodumoxesapodo.pdf
    • http://publicassistconsulting.com/uploads/1/3/0/6/130639972/4f7d9d34.pdf
    • http://lcm-enterprise.net/uploads/1/3/0/7/130775853/visaforovuxib.pdf
    • http://qyrios.co.uk/uploads/1/3/0/6/130604335/mimumixevowewipilof.pdf
    • http://hbb2017.com/uploads/1/3/0/7/130776299/gibijabow-renazovo-xemez.pdf
    • http://turbotides.net/uploads/1/3/0/7/130739640/7788355.pdf
    • http://abcplumbing.org/uploads/1/3/1/1/131164081/papis-lololebidibo-sawemezajo-bopirez.pdf
    • http://anjahill.de/uploads/1/3/0/7/130738870/farofus.pdf
    • http://lpunfinishedbusiness.org/uploads/1/3/1/6/131607930/19770a9cf8f2b4.pdf
    • http://informedoiler.com/uploads/1/3/0/2/130287257/3344516.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_off00005eb6.bin
89dcda664ca4d002cb7aec0bfcb6e895e5d33af0b84ea3006ba931d0bfe94764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 10368 bytes

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