Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb18b61028b4a5f…

MALICIOUS

PDF

46.3 KB Created: 2020-06-05 23:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: f0f2c2be8674d200440541bab7a5afcb SHA-1: 57b8b00050efd390ffbc945eabb6985f25a4461e SHA-256: 3eb18b61028b4a5fdd5702ea8c884a0aa1c74c0d0df97fa79feb3d121b5888f6
104 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to seemingly unrelated domains, indicating a link farm or SEO abuse tactic. The document body, though partially corrupted, contains text suggesting it is an 'Ohsas 18001 checklist pdf', a common lure for users seeking compliance documents. The presence of numerous PDF links, combined with the invoice/payment lure heuristic, suggests the primary goal is to redirect users to potentially malicious websites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://805.bpmtc.com/uploads/1/3/1/4/131452983/131452983.html#ohsas+18001+checklist+pdf PDF link annotation
    • http://damianconstruction.com/uploads/1/3/0/7/130740151/kafezefero-midota-pudejorufolalo-losedifib.pdfIn PDF document text
    • http://topdogwoodworks.com/uploads/1/3/0/5/130588727/182422.pdfIn PDF document text
    • http://venturavineyards.com/uploads/1/3/0/4/130488220/bc64a.pdfIn PDF document text
    • http://bbkconsultants.com/uploads/1/3/0/7/130776358/b75bfeb8ae6.pdfIn PDF document text
    • http://sandiegofurnishedrentals.com/uploads/1/3/0/4/130488338/2478214.pdfIn PDF document text
    • http://thewholisticyou.com/uploads/1/3/0/7/130775510/cb57f.pdfIn PDF document text
    • http://solone.com.sg/uploads/1/3/1/4/131452989/lifagimedalebaw.pdfIn PDF document text
    • http://misfit-world.com/uploads/1/3/0/6/130621280/supifololepes_wuvofuxokuf_zanuzudenid.pdfIn PDF document text
    • http://fsnederland.nl/uploads/1/3/0/5/130541140/busumexopigeroni.pdfIn PDF document text
    • http://bei-eliza.com/uploads/1/3/0/6/130620248/vubadakemivade.pdfIn PDF document text
    • http://twofatolives.com/uploads/1/3/0/6/130604780/d3a3a5bc26cc9af.pdfIn PDF document text
    • http://besthealthandfreedom.com/uploads/1/3/1/4/131483005/xilafavamuxo.pdfIn PDF document text
    • http://805.bpmtc.com/uploads/1/3/1/4/131452983/terms.htmlIn PDF document text
    • http://805.bpmtc.com/uploads/1/3/1/4/131452983/dmca.htmlIn PDF document text
    • http://805.bpmtc.com/uploads/1/3/1/4/131452983/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rogofuxeviso.files.wordpress.com/2020/06/jilebibivigivoraneruwe.pdfIn PDF document text
    • https://nepumoja.files.wordpress.com/2020/06/30259128534.pdfIn PDF document text
    • https://lotopakaxil.files.wordpress.com/2020/06/vugavixesisozeze.pdfIn PDF document text
    • https://kataxufekor.files.wordpress.com/2020/06/13870633037.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8742 11176 bytes
SHA-256: 22ac867e0a0ae1f875a9bc479b2dbf58253aa44428a82a99c8e04a9a615134da

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