Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c5ea316d2d7ed0…

MALICIOUS

PDF

37.5 KB Created: 2020-04-03 21:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5202747785490d4cba3f05880b13358a SHA-1: bfbd319b4dc57237999dbe682a5f3874adfd19fc SHA-256: 63c5ea316d2d7ed08b540be0a7e81c951dd0d0c79ee5827e4bae10ccaf630392
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fundraisers-aylsham.com/uploads/1/3/0/4/130489475/130489475.html#thunderbird+gamefowl+feeding+guide
    • http://eye2eyeratings.net/uploads/1/3/0/7/130739099/viwerowiputa-dapupufodasexag.pdf
    • http://anggrekcantik.com/uploads/1/3/0/6/130639603/banul-wokavufo-nogoz-zarururubug.pdf
    • http://wayofdroid.com/uploads/1/3/0/5/130539691/3a2b7168b.pdf
    • http://vaplc.com/uploads/1/3/1/4/131406528/dotudorimidedi-moziruguvovaron-borivotadixit-kigemuwuwinef.pdf
    • http://reporenovators.net/uploads/1/3/1/3/131379274/7104940.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_off000066e3.bin
cc9010984563836bbba1ec5b337bd365177097c6d9f565c60d114cffb1e0274d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 8760 bytes

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