Malicious PDF — malware analysis report

Static analysis result for SHA-256 424223804d45a458…

MALICIOUS

PDF

79.6 KB Created: 2021-05-03 10:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cef49eefd9afde0c70f6d52a53f9a948 SHA-1: 58d1a45f611be36798fc1ec93a206fa0f7aafedd SHA-256: 424223804d45a458141b919482e459e9d816fde18f8827f8d3dd3a1cfbe68fd3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a phishing-related domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest an attempt to redirect users to 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://ponafet.ru/strik?utm_term=is+selling+produce+profitable
    • https://cdn.sqhk.co/gevagedubop/gdia6ji/best_armor_for_minecraft_dungeons.pdf
    • https://cdn.sqhk.co/zosiwikiw/aijIhhf/gedija.pdf
    • https://cdn.sqhk.co/zepipawetopi/gejdgia/prison_break_season_5_episode_9_full_episode.pdf
    • https://cdn.sqhk.co/zujijivopuju/hj3S8ja/tisesovogep.pdf
    • https://cdn.sqhk.co/veladaxuzeba/fjc9tSk/galaxy_attack_alien_shooter_cheats_android.pdf
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/goxutokupisego.pdf
    • http://fresh-ita.fun/watch_pixel_online_free_megavideomwfbw.pdf
    • http://wide-do.top/material_science_engineering_internshipsiylad.pdf
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/javujuluxamemuv.pdf
    • https://furikokazi.weebly.com/uploads/1/3/5/3/135399827/1ddc95ad.pdf
    • http://bestpriceforukraine.xyz/pixel_car_racer_toyota_crownw19ox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5dc6e6f1-2ddd-4341-b323-c4b4b48ca46d/dometar.pdf
    • https://264aa3b4-28a3-4a3b-9cf4-afdf28ba9476.filesusr.com/ugd/28a074_5471fd48c192460fa73f3b3104491e03.pdf?index=true
    • https://s3.amazonaws.com/bifamomove/comparing_fractions_worksheets_grade_3.pdf
    • https://s3.amazonaws.com/gonasidupij/76272966341.pdf
    • https://uploads.strikinglycdn.com/files/788a5fe3-832f-4f19-863b-03a13cb4cd8e/molecular_biology_jobs_houston.pdf
    • https://s3.amazonaws.com/domegagowevag/fasovutikip.pdf
    • https://uploads.strikinglycdn.com/files/49bbd601-c515-417c-bfd4-fa5cbfd6ed52/why_does_my_dog_put_his_toys_on_my_feet.pdf
    • https://uploads.strikinglycdn.com/files/643799ee-baa3-41c6-b00d-5bf47e34fcf3/75897610964.pdf
    • https://s3.amazonaws.com/dakebesuvum/how_do_you_do_a_10th_step_in_aa.pdf
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_87df4bde710d4f5e81ac724379bef094.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_off0000f6bc.bin
6d6071eb568fc0d487600669580a57048589ebfffb5a8f58e34da49a9ad222fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 5400 bytes
font_01_sfnt_off00010923.bin
89be1e9f825284d9f20fb9172c1ca0d74baae662e8e45541bb0a754256068db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 11204 bytes

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