Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6cfbf81ec67fd4…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 19:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb9bb883065d516ca06cde12ac99eec SHA-1: 71fe8350563a9febbffed5ae435db3e36406499a SHA-256: 4f6cfbf81ec67fd47d648c2d50ab544e0abdd6b2774ab01dca0236bf3082cb34
136 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document uses a common advance-fee fraud tactic, disguised as information about COVID-19 rules for seniors. The embedded URL 'https://xezojetit.ru/aws?utm_term=what+are+covid+19+rules+for+over+70s' is a primary indicator of malicious intent, likely serving as a download or redirection point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/aws?utm_term=what+are+covid+19+rules+for+over+70s
    • http://love-cosmetics.shop/kidefivomifigetarugaripidigep.pdf
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5fc875fb29d61.pdf
    • https://cdn.sqhk.co/kadeposamo/fxpjdgN/hill_climb_racing_cheats.pdf
    • https://cdn.sqhk.co/wolanojijen/gePbhbb/47237107728.pdf
    • http://tugrull.com/big_little_lies_season_2_trailer_deutsch88dik.pdf
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5ff83267089b3.pdf
    • http://rollernefritmassage.xyz/how_to_fix_glacier_bay_bathroom_faucet9x88y.pdf
    • https://cdn.sqhk.co/nodujugebi/ip0rr7w/harris_jayaraj_telugu_songs_jukebox.pdf
    • http://brandframeb.com/32074760102l3qrd.pdf
    • https://cdn.sqhk.co/mekibekowufe/gH7gdhg/qs_world_university_rankings_by_subject_2020_education.pdf
    • https://cdn.sqhk.co/pesenexur/hG1Oehc/escape_hunt_the_lost_temples_room_3.pdf
    • https://cdn-cms.f-static.net/uploads/4448100/normal_6028a3c41b628.pdf
    • http://fumigatoff.online/chess_problems_book6prvq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3597c4b2-4583-4dc6-a0f5-1303a5a5768b/73361681616.pdf
    • https://uploads.strikinglycdn.com/files/ae63bdc9-eb19-4203-8275-a9aeb859e0bd/how_to_say_chrysanthemum_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/fbc8149e-b858-4b39-bb8d-a4f56ddb1846/65169218129.pdf
    • http://ropugefax.epizy.com/rmit_endnote_guide.pdf
    • http://gogositanisewu.rf.gd/white_gloss_sheet_vinyl.pdf
    • https://uploads.strikinglycdn.com/files/c0f87f7d-acee-40bb-80fc-6a8719bb1ee4/losakidatojanaxipuwujeri.pdf
    • https://uploads.strikinglycdn.com/files/e1e25678-343e-409c-bcae-4240f5f1acea/26297195796.pdf
    • http://dijesilelupav.epizy.com/2012_dodge_avenger_rt_interior.pdf
    • http://bixodog.rf.gd/tufejisidakivajedifejo.pdf
    • http://lajefuvubesij.epizy.com/ziluxojanuzop.pdf
    • http://rajimorix.rf.gd/men_at_arms_reforged.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_off0000f52e.bin
e89aebdc91fff87d6f98ae881ba929136b383089f6d20cbd6579da1dbdc91b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 5612 bytes
font_01_sfnt_off0001085b.bin
91ab3507a78431430e7204ab1d61e41bbe507ed70c0c126da48f4b8b7162b3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 11732 bytes

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