Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eea081e330c49d1…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 05:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d74135f4adb7efb04e27ce6247b13e9b SHA-1: 3529fc7fd420b95c6a01b9be06dfe1d8878e6070 SHA-256: 5eea081e330c49d1d175020cd7bc32d41d20fdba6b7f3b3cf9c014281bbc5696
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and it contains numerous embedded URLs, many of which point to suspicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. While no scripts were explicitly extracted, the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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 https://midufefew.ru/wix?keyword=garcinia+cambogia+original+pills PDF link annotation
    • http://uber-global.com/puwoxinelinouzke.pdfIn PDF document text
    • http://my-favshope.online/34257302451yz63r.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/fuxorouk90e.pdfIn PDF document text
    • http://dogopanasukodum.22web.org/ashrae_hvac_2001_fundamentals_handbook.pdfIn PDF document text
    • http://busevabafumoje.iblogger.org/centurion_movie_in_tamil.pdfIn PDF document text
    • http://sarkife.site/liftmaster_professional_garage_door_opener_manual2zkvo.pdfIn PDF document text
    • http://igme.site/coachman_vip_565_manualr95xl.pdfIn PDF document text
    • http://ronerikasov.22web.org/litarodevijatofiwowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botesuni.epizy.com/stranded_deep_multiplayer_mod.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_9e4cca1033cd4f6a9147a73b31d09cf1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/athlean_x_max_shred.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_e1ed2e40c4594ec88fd6f198273c36ca.pdf?index=trueIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_1042e64d8aed4666a4adfff5e3e420c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/lagu_twenty_one_pilots_anathema.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/1298788132.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_66288a50b3cc4eb68b51610d5d09fdaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/78101586349.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/it_security_analyst_salary_philippines.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_db3559f1b4c644ec967ff978c5c154d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakef/70923147396.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_93fe63587cbb4c8798409c386ae33c7a.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_e99aec5933594fa1a3fdbb66d5463fc1.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 5424 bytes
SHA-256: 401cc3b63e1c2b1ad6ee7b51385979f29d25ed3b320a2df4870c1d85ed462e21
font_01_sfnt_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 11352 bytes
SHA-256: 9acf6d840cd9105aec41249e586f0e76f95abfbca2291565c2642936713182a8

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