Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d46b96b3d84c05a…

MALICIOUS

PDF

71.3 KB Created: 2021-03-18 14:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a395c52e7c1c375174ff0b108f370b SHA-1: 566432e81349f0372155bd10d5e71450a10c89eb SHA-256: 1d46b96b3d84c05a9bb54d26f3ba8228744ead1f3207f503330147892178066c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs point to potentially malicious domains, suggesting the document is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/award?keyword=bosch+classixx+5.+5+manual+pdf
    • http://cpatrump.com/norarifo7u0ry.pdf
    • http://mizizufiku.mywebcommunity.org/don_t_look_back_in_anger_spartito_piano.pdf
    • https://takimibovejexi.weebly.com/uploads/1/3/4/5/134512521/xivobosuzofaxuw.pdf
    • https://cdn.sqhk.co/zifixanuk/jbWjegi/84737949143.pdf
    • https://cdn.sqhk.co/nisugavu/guiahea/1st_grade_math_worksheets_free_online.pdf
    • https://cdn.sqhk.co/tixukiko/aicgghd/gegafoviromo.pdf
    • https://cdn.sqhk.co/bubuzibiv/5jd0jeC/seeds_for_minecraft_pe_jungle_village.pdf
    • http://naturka.space/migasuao9x1.pdf
    • https://cdn.sqhk.co/sunomedude/GjjT0hf/switzerland_population_growth_rate_2020.pdf
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/jinupalotegukoforop.pdf
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/jojinexuzuvumagiwi.pdf
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/c8a0c41accd129.pdf
    • http://hydrofthol.space/coldplay_fix_you_piano_sheettywbu.pdf
    • http://return-0.com/vehicle_blackbox_dvr_user_manualu3qs7.pdf
    • https://cdn.sqhk.co/nezerozara/d5y39jj/83323901284.pdf
    • https://cdn.sqhk.co/jabakujivim/ykjEUhd/slide_away_video_with_lyrics.pdf
    • https://cdn.sqhk.co/merisipugito/jgYgf78/detewetojakagixol.pdf
    • http://kanaxade.mygamesonline.org/vizio_e40-c2_universal_remote_code.pdf
    • http://lazujifoxupa.getenjoyment.net/gimidokejixizaruwitewaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/657c1c78-9a35-47be-8e17-8ad430966014/bilamudagusavezujifilidod.pdf
    • https://uploads.strikinglycdn.com/files/62f8ef89-8047-44e4-95ef-ef8b5193d37d/can_you_watch_big_little_lies_on_apple_tv_for_free.pdf
    • https://uploads.strikinglycdn.com/files/a438e55b-1418-4dc4-b55a-8c790df74662/6981201516.pdf
    • https://uploads.strikinglycdn.com/files/f2aa5eae-babd-4422-b7b3-07548b98bc0c/the_girl_movie_watch_online.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_off0000d93b.bin
879126bda2aab562beb92184f37533b3fa59709378ad8a8b1e303c20da285c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 5572 bytes
font_01_sfnt_off0000ec1f.bin
dead56575c7838046d93ed85ffee4675b80689f8fc9afea91025f41fa693b2a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 11204 bytes

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