Malicious PDF — malware analysis report

Static analysis result for SHA-256 4391a3e11b928872…

MALICIOUS

PDF

84.6 KB Created: 2021-03-16 07:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e24da2bd261e1fab156cfd22d45f697 SHA-1: 4237e2813833c92df04d366b57116d2aae4ca59a SHA-256: 4391a3e11b9288724ed995f10fba4a9e9ff3f820cf57b6221220e3cd4f5da136
124 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection as 'Pdf.Phishing.Trojan' and the presence of embedded URLs further indicate malicious intent, likely to direct users to phishing or scam content. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4915

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/aws?utm_term=code+de+la+route+etats+unis
    • https://ziwupaxibupava.weebly.com/uploads/1/3/4/3/134379030/6e0a9f3.pdf
    • https://cdn.sqhk.co/wiluxuko/chc9iht/sean_paul_temperature_lyrics.pdf
    • http://ketaton.mywebcommunity.org/lexus_es_350_horsepower_2010.pdf
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/galitetiwuze.pdf
    • http://sawemawe.mywebcommunity.org/68056656140.pdf
    • https://cdn.sqhk.co/xawefigi/qVhanhc/muntaz_halilintar_wallpapers_4k_hdr.pdf
    • https://mamulexujixi.weebly.com/uploads/1/3/5/3/135390653/xokidiroro-foxekiz-domaz-nawakut.pdf
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/a3e7fd627d66.pdf
    • https://cdn.sqhk.co/kajipazuto/i5ih7hj/91135954353.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_f2ec1127cf5d41f5b6375b1a111b598d.pdf?index=true
    • https://s3.amazonaws.com/wefadep/zepexamo.pdf
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_9f188992e6d84879a7f3258f5cef8b79.pdf?index=true
    • https://s3.amazonaws.com/dazawojob/21357900245.pdf
    • https://s3.amazonaws.com/kavugusepe/chrome_linked_images.pdf
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_e8ec4e0abb0d4b039ea60f949f214bf5.pdf?index=true
    • http://kopolug.myartsonline.com/lakhmir_singh_physics_class_10_solutions_refraction_of_light.pdf
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_c79d46ba31bf481487d0da58722e54a6.pdf?index=true
    • http://tuwutexo.onlinewebshop.net/pediatric_depression_questionnaire.pdf
    • http://kofaxafogi.myartsonline.com/24051877635.pdf
    • https://bd09a4ac-0dd2-4533-a87c-7e18f90dd81b.filesusr.com/ugd/1b0481_00218166e9f0448b8a300e960cc99e4c.pdf?index=true
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_1cd1b7b9e2a84d87b5636130209c6724.pdf?index=true
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_907563d9e53d4b148216178c076a7932.pdf?index=true
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_a5805bc3512246aea520829793c1119d.pdf?index=true
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_56057a5d59e84007a5027b0729b4207d.pdf?index=true
    • https://s3.amazonaws.com/mexijegedakol/filmy_wap._com_2018_bollywood_movies.pdf
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_4acd6d6ac42b4090819aad1882e60d1d.pdf?index=true
    • https://s3.amazonaws.com/tevomenil/aghora_pasupata_homam_in_telugu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d30.bin
2a71a73f134d22a82ce28343994971ef85cf3f4df831dc4eb920494584c15825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 4724 bytes

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