Malicious PDF — malware analysis report

Static analysis result for SHA-256 3272f939c0a80a50…

MALICIOUS

PDF

80.7 KB Created: 2021-03-20 12:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753a188f97ced3e1100da7bc5d8eed99 SHA-1: a01e0d182aa64db726a600c43cf18f1fd4d4bd9b SHA-256: 3272f939c0a80a50f20ba990099bc6339c426b1226beafa81de68ffd3e715849
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or redirection attempt. The primary malicious URL identified is https://ponafet.ru/123?utm_term=lettre+de+motivation+analyste+d%2527+exploitation+informatique, which is likely used to redirect the user to a phishing or malware-hosting site. No scripts were extracted, but the PDF structure and numerous external links indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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
  • 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://ponafet.ru/123?utm_term=lettre+de+motivation+analyste+d%2527+exploitation+informatique
    • http://masezigo.iblogger.org/nagulagibaxifekirebubefun.pdf
    • https://rirofogarerena.weebly.com/uploads/1/3/0/7/130775169/butonifubavadu-gimenepo-bijaralekavoro.pdf
    • https://wazexexa.weebly.com/uploads/1/3/5/3/135305699/3adf87.pdf
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/welur-ravenuroxe-puteferojiriwem-besuvezifivo.pdf
    • https://fetagurekejoj.weebly.com/uploads/1/3/2/7/132741571/nizenogamemij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_d4e90c0aa6fb468f8b0e7f34bc5f5dcf.pdf?index=true
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_4344ea8de0d3439d8ba3d551a556c274.pdf?index=true
    • http://gamovomubapo.rf.gd/bipegokovepafemovalim.pdf
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_9675b1d0af2f432ca8c9e3a75210868f.pdf?index=true
    • http://kusofiwu.epizy.com/gy-_30_light_sensor_datasheet.pdf
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_49af82fcbc8a4388abc326e12f944324.pdf?index=true
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_9b32d802dca04203abc5da2f9f22266c.pdf?index=true
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_dece6e5c320c4ed193b9d50bee1083ce.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_e41639ba2da34dabb48444171ec83bc0.pdf?index=true
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_caabe826938549e187e7d084486b1809.pdf?index=true
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_7654720eef46486f954b2d94268527db.pdf?index=true
    • http://pivirujifija.epizy.com/humminbird_helix_5_g2_si_gps_fish_finder.pdf
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_62b5069bd0a2429dabb5c341b030986c.pdf?index=true
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_ad9d26574ac34483a4040206b9623fd1.pdf?index=true
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_b65dfdd206344bc49500f986bd5d6462.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e966.bin
abe743951d1a091c4add05765df459fc748e1fc3bc95023e5dd707c5ea7fe5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 5400 bytes
font_01_sfnt_off0000fbc1.bin
2b49904d558f959c1131272d0b98d215dd69b8bc976fd3a760f9bd39a457e38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 13008 bytes
font_02_sfnt_off000124c8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124C8 4324 bytes

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