Malicious PDF — malware analysis report

Static analysis result for SHA-256 8229e593997bfa7a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-21 11:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15868a10669384c43260f32cfae7c6c1 SHA-1: a1c61d839cc09511742a4b86d05be0d2bddbb49c SHA-256: 8229e593997bfa7a06cc6f1604fe8bc9f46bb67ab74167b311ffd7f3387abb05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a mass link farm. One of the primary URLs, 'https://zajinet.ru/wix?keyword=the+raga+guide+album', is directly associated with the file. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', strongly suggesting a phishing or trojan distribution intent.

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://zajinet.ru/wix?keyword=the+raga+guide+album
    • http://gasiwine.iblogger.org/35527045609.pdf
    • https://niwosegebopusa.weebly.com/uploads/1/3/4/5/134583118/fimixavimo_nuvunufif_ledezagud.pdf
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/famosoz-wezipetogo-mifakoforatal-tewoje.pdf
    • http://lonupupob.iblogger.org/bone_daddy_s_menu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8840b2d8-bb58-40fe-b2fd-6b1d844c7a1a/man_of_sorrows_what_a_name_chords.pdf
    • https://uploads.strikinglycdn.com/files/8bf382f1-7cde-41e8-abc4-8d02179adc5d/what_are_the_principles_of_quantum_physics.pdf
    • https://uploads.strikinglycdn.com/files/0c32f19c-a747-46f8-b841-581db2ba022e/dyson_dc39_filter_replacement.pdf
    • https://uploads.strikinglycdn.com/files/1bd13ccd-6bae-45f2-921b-00caa16573e1/how_to_program_chamberlain_garage_door_opener_remote_953cd.pdf
    • https://uploads.strikinglycdn.com/files/d750595a-2664-40a5-962c-7ca211cf1ca3/how_to_be_a_good_public_relations_officer.pdf
    • https://uploads.strikinglycdn.com/files/00f659ff-7269-4daa-a6d0-a849eec9102d/rankedin_spt_trelleborg.pdf
    • http://gapolofivevos.epizy.com/sabertooth_990fx_r2.0_chipset_drivers.pdf
    • https://uploads.strikinglycdn.com/files/35542fbf-954e-44b1-8934-7a7590641257/65837556517.pdf
    • https://uploads.strikinglycdn.com/files/85831d8d-8bd6-4448-ac6a-5d35aa67b518/android_app_development_for_free.pdf
    • https://uploads.strikinglycdn.com/files/2b807887-dc0c-4861-b748-dfe86d7aae5c/cs_lewis_screwtape_letters_synopsis.pdf
    • https://uploads.strikinglycdn.com/files/3acc07b1-1462-4ab2-8770-ca13fe0e35c1/bawimexipejafuvobu.pdf
    • https://uploads.strikinglycdn.com/files/4f0f407b-07e8-4b82-afbb-79196613e9e5/puvonotatalejo.pdf
    • https://uploads.strikinglycdn.com/files/9f1b048b-a0e6-4175-87da-0786db780139/60277959265.pdf
    • https://uploads.strikinglycdn.com/files/ad8e26a3-1600-45e3-a471-d2386e058eb7/what_do_dreams_mean_psychology.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_off00010351.bin
b96a75c037a7fd15981e0626da6bdac99152a7786539794ad23ddded35974c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 5152 bytes
font_01_sfnt_off000114a7.bin
947b940b99380f9a44cd38c6ae2e48b0e3c0488a99021dfd9ccc1eace5320567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A7 10704 bytes

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