Malicious PDF — malware analysis report

Static analysis result for SHA-256 673922c558a9c59c…

MALICIOUS

PDF

76.0 KB Created: 2021-05-30 00:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 411ece570dbdb065bf702532e133382a SHA-1: c24f013137c9704c1f2db26270250b753696bbfd SHA-256: 673922c558a9c59c5dc3d6ae67ec45efe934ea03884b2924c93e4e16c621a73c
226 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, characteristic of a link farm used for SEO manipulation or to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's purpose is to trick users into believing they have won a prize or are expecting a parcel, a common advance-fee fraud tactic. While no scripts were explicitly extracted, the presence of external links and the overall structure suggest a phishing or scam attempt, likely leveraging embedded JavaScript for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+file+a+warranty+deed+in+texas
    • https://fojevuresuzuj.weebly.com/uploads/1/3/4/8/134881640/midamemudased_sibagufoxi_lopanalazukojip_tesusevo.pdf
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/kukobaf.pdf
    • https://cdn-cms.f-static.net/uploads/4426423/normal_6059c36c9702f.pdf
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/fogesuvonugopofu.pdf
    • https://kabolonopatine.weebly.com/uploads/1/3/4/2/134265344/bijasuzelakoresa.pdf
    • https://zurareren.weebly.com/uploads/1/3/4/5/134583426/sekabiw_rimerit.pdf
    • https://static.s123-cdn-static-d.com/uploads/4407057/normal_60aff9a31bc55.pdf
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/gasoxubugunave-podiketo-kilujinerepegi-zulomima.pdf
    • https://sawasivived.weebly.com/uploads/1/3/4/3/134378202/2bfce00edc7e.pdf
    • https://xakabitugaret.weebly.com/uploads/1/3/4/3/134366923/ce4173bc6cbbfc.pdf
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/4683311.pdf
    • https://sunupukub.weebly.com/uploads/1/3/5/3/135319403/8367371.pdf
    • https://static.s123-cdn-static.com/uploads/4411218/normal_5fe013fae047d.pdf
    • https://nubamosotaz.weebly.com/uploads/1/3/1/3/131383510/vowagivonujo.pdf
    • https://cdn-cms.f-static.net/uploads/4416143/normal_6034dc757ae55.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bfa55f15-e847-441a-bce6-8635841ca11d/83308191975.pdf
    • https://uploads.strikinglycdn.com/files/638a1459-58e4-40ac-b269-3ce5ba5a39ce/rode_videomic_pro_battery_change.pdf
    • https://uploads.strikinglycdn.com/files/f55c08be-4cbe-4ab5-a749-248b66475c78/what_is_the_message_behind_the_metamorphosis.pdf
    • https://uploads.strikinglycdn.com/files/9bae2587-a039-457f-a932-fd69e3b94635/how_much_does_an_sql_developer_make.pdf
    • 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_off0000ec82.bin
efa3bc2fa99253cd9a7e5ad81346703914e4eb6f170a39c10893f7d400c50e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 5124 bytes
font_01_sfnt_off0000fe1b.bin
93d1ad3023b2024f0acf0ec7e76d8019bdddfd0bd8260a3754889780ae1856e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1B 10816 bytes

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