Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c462b6705df509b…

MALICIOUS

PDF

83.4 KB Created: 2021-04-07 14:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2940454f71942ededbc39c3a326048f6 SHA-1: 682dab4f50f8d3d6c9ed26967f1dacb3a73d0264 SHA-256: 2c462b6705df509b37a785aa0835edf2ecfb45b57b3b7c5b621db8a37da411a1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of an embedded URL and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution intent. The file's structure and heuristics point towards it being used as part of a link farm to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/wix?keyword=ar+15+instruction+manual
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/netikesodaku.pdf
    • https://gopebuxagofu.weebly.com/uploads/1/3/2/6/132681698/8714968.pdf
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/398a165c2b1ee1.pdf
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/vunegoda_zuwab_tujirazirawuji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/neporezofov/mitologia_griega_nombres_de_dioses.pdf
    • https://uploads.strikinglycdn.com/files/3ae275c5-26fd-4730-b63d-8b007377ae66/perimeter_worksheet_for_grade_5.pdf
    • https://uploads.strikinglycdn.com/files/cea6d9ba-9478-46ef-95b3-2a1e297c52b0/what_are_the_functions_of_male_and_female_cones.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_de837f49e84641669763027820d82070.pdf?index=true
    • https://s3.amazonaws.com/sorapobuk/96209826928.pdf
    • https://s3.amazonaws.com/baposivarabuj/wugijekivepu.pdf
    • https://uploads.strikinglycdn.com/files/ab008078-9013-4722-b11d-98b9cbed9199/how_to_use_gazelle_glider.pdf
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_aa594c1e83754165b81ed13b5e3635ee.pdf?index=true
    • https://s3.amazonaws.com/kikunojulejuj/blaupunkt_tv_manual.pdf
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_ebad27bca6ce49f898125b23ecbe3e87.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7526d60c-fc58-4550-ae84-1be914966db1/89334045676.pdf
    • https://s3.amazonaws.com/gazijewevan/bipudalonijipana.pdf
    • https://uploads.strikinglycdn.com/files/60c06bf0-4a9d-4ff2-af26-b553db2ab53d/dremel_395_parts_list.pdf
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_79cee126058b496ca01a9fa92de1cd9a.pdf?index=true
    • https://s3.amazonaws.com/jevedijadiki/les_inrocks_guide_des_festivals.pdf
    • https://uploads.strikinglycdn.com/files/c5c3e43e-5e25-4286-a97f-afcf286ce8e1/magic_chef_refrigerator_mcbr1020w_not_cooling.pdf
    • https://uploads.strikinglycdn.com/files/11f2eb38-23b7-4c6a-a625-b06c52c1d1d0/63101203744.pdf
    • https://s3.amazonaws.com/wifiduxezo/cdate_format_date.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_off00010a4f.bin
caaf5c74cb505e5e0d57e3a4584ca44bbe3d03752df1ae3cd55ac4d51428f113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 5112 bytes
font_01_sfnt_off00011ba6.bin
c7e837c377f97104a6c8d9c7763f4ddd610954835d36576e762aded06cb6876a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 10708 bytes

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