Malicious PDF — malware analysis report

Static analysis result for SHA-256 9883462a044f0fe1…

MALICIOUS

PDF

87.3 KB Created: 2021-04-28 04:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b7a1126055e4bbf12e8932f92587eb SHA-1: 5bc51f26513736a76379fb7a0f0dc95ce5d9984a SHA-256: 9883462a044f0fe1c09987ec949fa8eedf6d2c3e578a101a52150f65de294737
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to Weebly and Strikingly hosted PDFs, suggesting a link farm or SEO abuse tactic. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=are+tiny+homes+allowed+in+ontario
    • https://tesejusijup.weebly.com/uploads/1/3/4/7/134704228/26996a.pdf
    • https://cdn-cms.f-static.net/uploads/4457296/normal_605f95d801971.pdf
    • https://xilexuluta.weebly.com/uploads/1/3/6/0/136094269/9f889a.pdf
    • https://lujogome.weebly.com/uploads/1/3/4/6/134617312/5950581.pdf
    • http://ygrash.website/what_is_another_word_for_sunshine_recorderw3q27.pdf
    • https://cdn-cms.f-static.net/uploads/4466161/normal_60100f706e253.pdf
    • https://static.s123-cdn-static.com/uploads/4425005/normal_5ff62129918be.pdf
    • https://static.s123-cdn-static.com/uploads/4415291/normal_5ff53b070466b.pdf
    • http://ig-copyrighthelpcenter.com/how_to_design_and_evaluate_research_in_education_9th_edition_free_downloadisxkf.pdf
    • http://chelamela.org/why_was_walmart_successful_in_germanyrntkg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zifilobesumafi/gixarekutorikavuze.pdf
    • https://uploads.strikinglycdn.com/files/b6b146be-8c32-4f45-bff7-955a042c0723/3114308763.pdf
    • https://uploads.strikinglycdn.com/files/5bc67242-c377-4cf7-b940-b8b165712a21/manual_de_instrues_da_impressora_hp_officejet_4500_desktop.pdf
    • https://uploads.strikinglycdn.com/files/2343107a-54cb-4ade-a41d-2fc1de27272a/pasusuwibili.pdf
    • https://s3.amazonaws.com/labitajaxatufib/61489632888.pdf
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_d8757da93da84bf4ae3e73fc436e631e.pdf?index=true
    • https://s3.amazonaws.com/pulavokaxe/47705775703.pdf
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_4f492ac60355493eae86cab323f25bbe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a128a164-8515-4540-b9b5-761618b49deb/escudero_de_dios.pdf
    • https://uploads.strikinglycdn.com/files/19a40d91-20d6-49dc-a1c1-b1b34a97eda5/26725292890.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff13.bin
1220bf091d26db52d111a8c1c5cb13c1e1eb352067e8c38be9ae53ae84289c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 5036 bytes
font_01_sfnt_off00011003.bin
a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 2024 bytes
font_02_sfnt_off00011998.bin
31b8d60336ce754409fb371747a178f995fad99eb81fb686023bfa56cd2b83c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 11924 bytes
font_03_sfnt_off000141ae.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141AE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.