Malicious PDF — malware analysis report

Static analysis result for SHA-256 812c3d74f8e69d0e…

MALICIOUS

PDF

37.1 KB Created: 2020-06-03 22:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2805973e73a549d96d0c7eed43ae60cb SHA-1: 99775bf20dc5df31c87f1a638b3cf003d953b086 SHA-256: 812c3d74f8e69d0ed9158e8fe658007edcda1098da754e98d3d40509b4b5705c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious payloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests a coordinated effort to redirect users to potentially harmful content. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://211.bpmtc.com/uploads/1/3/0/9/130969200/130969200.html#how+to+get+auras+in+destiny+2
    • http://mytajfashionincorporated.com/uploads/1/3/0/4/130483373/1377892.pdf
    • http://rickmason.info/uploads/1/3/1/4/131453021/jemulewodin.pdf
    • http://ambidfilms.com/uploads/1/3/0/6/130620704/d1a208.pdf
    • http://pop3.caw.co.nz/uploads/1/3/1/0/131070469/fbdddbb.pdf
    • http://1318designs.com/uploads/1/3/1/1/131164387/gumiki.pdf
    • http://larisahinojosa.com/uploads/1/3/0/7/130740110/34406e345e269.pdf
    • http://74-123-72-230.mgwnet.com/uploads/1/3/0/2/130288563/wesezu.pdf
    • http://swoleaddict.com/uploads/1/3/1/8/131856232/suvifugepudutek.pdf
    • http://thevintagemahal.com/uploads/1/3/0/5/130543671/lapexedaribape.pdf
    • http://mail.dartmouthcomputing.com/uploads/1/3/1/1/131164164/2b056862bbf3.pdf
    • http://roots-wellness.com/uploads/1/3/1/3/131398022/basinunotaf-vexapobezawo-bopuru-siwifitezijomut.pdf
    • http://mx.rafaelsax.com/uploads/1/3/1/4/131453539/vanonapobavad.pdf
    • http://hostmaster.motorsportsisterhood.org/uploads/1/3/0/7/130740089/gisufurupe.pdf
    • http://211.bpmtc.com/uploads/1/3/0/9/130969200/terms.html
    • http://211.bpmtc.com/uploads/1/3/0/9/130969200/dmca.html
    • http://211.bpmtc.com/uploads/1/3/0/9/130969200/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wadixodit.files.wordpress.com/2020/06/67010972785.pdf
    • https://relexuxiwa.files.wordpress.com/2020/06/63181085451.pdf
    • https://jibepus.files.wordpress.com/2020/06/71510317152.pdf
    • https://dedokufon.files.wordpress.com/2020/06/livoxagupubape.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a3.bin
19b446121d165644456351da7073bdc14bfda7ae3bee6515a58f77de87d1133c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 10128 bytes