Malicious PDF — malware analysis report

Static analysis result for SHA-256 d373199cff0fe764…

MALICIOUS

PDF

39.1 KB Created: 2020-06-06 14:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d0d6dbd3892e47be317d8e0a40ed394 SHA-1: f5987f1a86f85c8c598682354ab55b41b81958b2 SHA-256: d373199cff0fe76482a32bef5055ac9028d7f2635b2837b1b3b3d02f05dab8b9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The primary attack pattern involves leveraging these numerous links to redirect users to potentially harmful websites.

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://0tyki.bpmtc.com/uploads/1/3/0/8/130814070/130814070.html#internet+explorer+8+portable
    • http://capehandyman.org/uploads/1/3/1/3/131398459/8037565.pdf
    • http://laurenleeart.org/uploads/1/3/0/4/130476912/f049dce2.pdf
    • http://colemanlegalpllc.net/uploads/1/3/0/6/130605283/36ef1c8bb.pdf
    • http://baycreekband.org/uploads/1/3/1/4/131437275/koxefekumopur-kefobax-kaworebeb-goxosinosevi.pdf
    • http://greer-harris4sped.com/uploads/1/3/0/5/130550876/bodazimibiga.pdf
    • http://hostmaster.ostfoldseilkrets.no/uploads/1/3/0/6/130621846/jodeva.pdf
    • http://afcsantacruz.com/uploads/1/3/0/3/130323632/xipikes_zutuneveparel_lujifugutawitag.pdf
    • http://thenegativespacebetweenus.com/uploads/1/3/1/4/131454359/6938483.pdf
    • http://lightonmyfeet.com/uploads/1/3/1/1/131164211/2329555.pdf
    • http://studio-essegi.com/uploads/1/3/1/4/131410818/jutefujifalex.pdf
    • http://0tyki.bpmtc.com/uploads/1/3/0/8/130814070/terms.html
    • http://0tyki.bpmtc.com/uploads/1/3/0/8/130814070/dmca.html
    • http://0tyki.bpmtc.com/uploads/1/3/0/8/130814070/policy.html
    • https://fesivalodif.files.wordpress.com/2020/06/javoronibana.pdf
    • https://rosevus.files.wordpress.com/2020/06/bodib.pdf
    • https://limowuzeram.files.wordpress.com/2020/06/72577344983.pdf
    • https://wefujafuj.files.wordpress.com/2020/06/70570482645.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_off00006bb3.bin
501fd6a60fafbdd5dd1b0c2fe366d4a06fd2018ea4f89bf738df14d371fd07b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB3 11068 bytes

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