Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d22daa265c5308…

MALICIOUS

PDF

114.7 KB Created: 2021-03-28 20:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5218a4259b64d0111ef04dfaceaccd8b SHA-1: 5e62cfe249e6d912f2186e5b2e04eefd655afb77 SHA-256: d3d22daa265c5308d1869e3fb463462316ec9bc5096cdece85345969cd0869ef
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and one of these links points to a URL that appears to be a lure for 'black ops 2 weapons'. The ML classifier and ClamAV both flagged this PDF as malicious, specifically as a phishing trojan. The presence of many external links suggests an attempt to redirect the user to potentially malicious content or to engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pelibifir.ru/wix?keyword=black+ops+2+weapons PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fcb175084ba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_604ae30707cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd3a6d3a17b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_60258bcf0fea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_6036c8706c16e.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/s83Dgig/diy_paper_crafts_easy_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_6055c04b2c19e.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/9jhihgf/mod_apk_ben_10_heroes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6021cbc7cbdd0.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/idggDgh/download_larva_heroes_battle_league_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/2sVpvCf/41067282148.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/fRQiavY/easy_video_maker_free_download_for_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_6041e1bc43f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5ffd443bc3975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_6041ab5c59cfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a9cc40-d3d4-42f1-a786-c95205f94cdd/33931694306.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_80685bf3e5ab46b89de0307eab7849ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/herbivore_carnivore_and_omnivore_worksheet.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_b69dd0724db44e02828c4d64d9e5f1bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/dezeroxukujozotaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace8806f-3ef7-4cee-b487-9dbe4dc0f26e/coast_guard_maritime_law_enforcement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741ea652-4634-415e-bedf-c43db1699085/how_to_replace_dyson_dc35_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/jokomakexinitiza.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/awadhesh_premi_ka_bhojpuri_gana_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/kawuredidefovinuman.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000181a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A9 5168 bytes
SHA-256: 197edf5a522db6b8aecff3959d41bf521e56c595a882eb06c557ff96a64623af
font_01_sfnt_off00019370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19370 12232 bytes
SHA-256: d3250711707d928373824cf702a75439f265c0504bffbdae2753710690691369

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