Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec861778e40332b…

MALICIOUS

PDF

65.4 KB Created: 2020-11-26 23:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9e72d6923171847c9b845db10b2c391 SHA-1: 91d51c24e45ad7e208fc46984fad605e8f640f4e SHA-256: 6ec861778e40332bf95c0a1ba036089085ec0ea0fc3aa4ed08d784c8e61dd161
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://traffking.ru/strik?utm_term=psychology+of+success+denis+waitley+pdf PDF link annotation
    • https://tenaxujapem.weebly.com/uploads/1/3/4/3/134341928/bulogutijumikarel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5fa92b792afda.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/3398306.pdfIn PDF document text
    • https://giligigava.weebly.com/uploads/1/3/4/4/134494785/1d1ded.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/3002937.pdfIn PDF document text
    • https://vonojatu.weebly.com/uploads/1/3/4/7/134711894/nowoziwiketazu-nexofoze-kifunogiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fb2a0a5e950e.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/6f4eaafa982c4.pdfIn PDF document text
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/wemisipekutesulam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/xivaxujisupukavizukezopa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/free_2006_harley_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730977ff-2e59-4cb0-83dc-5db1503df8a7/names_of_fingers_medical_term.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8ee7db-808c-4f9e-9d8f-318264e4b66e/trading_in_the_zone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ca1e0a-61f8-49a6-b3eb-e3c4d0c8af68/84066472261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7bc4c0-023d-4479-8261-794d14c20dec/10762546719.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/14684815243.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/xesogovuvekulepiviwus.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F4 5400 bytes
SHA-256: 19c18078cc577f371b7edf4b587bae1c5ec754a3019d64932f4d96defaa5952e
font_01_sfnt_off0000c85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85E 9908 bytes
SHA-256: 3d46320d501b7d7c1a22d3e4b4711716c407a1659da2906fbf9f3b002e086636
font_02_sfnt_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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