Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd58d3239195d7c…

MALICIOUS

PDF

103.7 KB Created: 2021-04-14 05:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1075a9b3053967f1e8051b00eeffb384 SHA-1: 7f89b998dc18aeeb82a0aa6b9f1d30159d509431 SHA-256: 2cd58d3239195d7cbb9bf112a6de7c56d777fd1e625ff998cc4ad09926f9fc44
196 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a "PDF link farm", and is flagged as an "Advance-fee scam lure". The presence of multiple external URIs and the nature of the heuristics strongly suggest a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure itself likely facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/strik?utm_term=petsafe+in+ground+fence+manual
    • https://cdn.sqhk.co/zitajazasu/ejfBGhb/kowiduzogawuravotekan.pdf
    • http://nenotuwafuxigot.22web.org/what_kind_of_transmission_fluid_does_a_2005_jeep_grand_cherokee_take.pdf
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdf
    • https://rulakufip.weebly.com/uploads/1/3/4/4/134489053/xuwex_nejuzidaxewux_mivad_fotodomexe.pdf
    • https://juguzitusiketi.weebly.com/uploads/1/3/4/3/134372303/vukaraz.pdf
    • https://cdn.sqhk.co/vanewano/jbgeYje/bamozudalodisuvoxamu.pdf
    • https://bososotozakep.weebly.com/uploads/1/3/1/4/131437593/fegabisido.pdf
    • https://cdn.sqhk.co/jiluputumusi/feT9igD/5596131178.pdf
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/5200504.pdf
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/2272156.pdf
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/5301936.pdf
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/6611439.pdf
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/tuparasugoxeg.pdf
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/notewodubeveg.pdf
    • http://gagilirefoj.22web.org/1183329374.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://getuvokelowa.rf.gd/15797482861.pdf
    • https://s3.amazonaws.com/tarizirefevifab/the_case_for_christ_lee_strobel_free_ebook.pdf
    • https://s3.amazonaws.com/pesetufavo/cg_movie_site_list.pdf
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_828a8487c1d047dd976f2ae8286cf33e.pdf?index=true
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_7399eb0edb934a7ebb0857748105b638.pdf?index=true
    • http://jutademopewe.epizy.com/vasogoxamivikukafotof.pdf
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_f6f82ddd99fc4efcab680447ca72c5e2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015569.bin
5f6d55edb0638752a1e4037a809cceb80003597852d61a6151eed01d41e7fa8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15569 5340 bytes
font_01_sfnt_off00016785.bin
be3d381d53f425252e8f07c87fe0d116b78202667fd7dd609a99105e4939a3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16785 11724 bytes

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