Malicious PDF — malware analysis report

Static analysis result for SHA-256 89176b084b8b87d9…

MALICIOUS

PDF

82.0 KB Created: 2021-03-23 17:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e2a0c5443d4628f79ce5dc9c4311b8 SHA-1: d560300da370afae5e20684442425325fc0200c3 SHA-256: 89176b084b8b87d98166f45bd23f76f5c7ce81a457b0f21761f516b560c7dc28
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on dynamic DNS services or free hosting platforms, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=samsung+top+load+2pc.+gas+washer+and+dryer+set
    • http://metalllift.ru/jidemr5p16.pdf
    • https://lelejijavifol.weebly.com/uploads/1/3/0/8/130874253/bd9f3.pdf
    • https://cdn.sqhk.co/vefusujix/ijhdOic/bobewifaxajivudagikujit.pdf
    • http://losqutoq.online/keto_food_tracker_templatehxffo.pdf
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/8787a017.pdf
    • https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/tikezaronusixed_kidozowo.pdf
    • http://mufutekuson.getenjoyment.net/94224207023.pdf
    • https://cdn.sqhk.co/sobexofap/dggk4jj/bc_womens_hockey_twitter.pdf
    • https://tozusasulinun.weebly.com/uploads/1/3/4/8/134872335/biwomijirabubamogo.pdf
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/kagare.pdf
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/ledeniveb_kukisekadoxotax.pdf
    • http://xuxijosut.sportsontheweb.net/5671129610.pdf
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/xojudokifisi.pdf
    • https://cdn.sqhk.co/mevazasid/bZNjbTG/polo_cafe_racer_jacket_brown.pdf
    • http://oneitstore.info/nature_emerson_transcendentalismk1354.pdf
    • https://cdn.sqhk.co/maduzonuxoke/ggfjchi/88541210406.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://damowepoko.myartsonline.com/9687287023.pdf
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_476195de382a428fa5e3f0b9dc1dbc16.pdf?index=true
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_b931708f57e3413b8095e569ddb19a73.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_off0000f30b.bin
797b7174008c913b83fae1fc2c895fd617df750409fca00ba82d092619763f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5784 bytes
font_01_sfnt_off0001069f.bin
dcb561157ce154852792c8ae1c317ffd15dac43598c9ea0f4041b85624a8c94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 11152 bytes
font_02_sfnt_off00012c80.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 4324 bytes

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