Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7934dcf509c8e9…

MALICIOUS

PDF

84.5 KB Created: 2021-03-25 17:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d97c0b6dfcc136e6df296258fd5bfcb SHA-1: d7a9ff4ce3cd5a1a1abc5725f2ec8208f9841ea2 SHA-256: 5b7934dcf509c8e9fd001110be60b6abdd835911640939555153b8aa650ac7c0
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that mimics a search result for a textbook, likely intended to trick the user into downloading a malicious file. ML classification and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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://pelibifir.ru/award?keyword=calculus+and+its+applications+12th+edition+pdf+free
    • https://cdn.sqhk.co/japuwejede/djegdk5/gravity_runner_x.pdf
    • https://cdn.sqhk.co/sujutowupolu/HNjbsjj/s8_edge_lighting_not_working_when_screen_off.pdf
    • https://cdn.sqhk.co/zadexona/fyjjLge/endocannabinoid_system_and_cbd.pdf
    • https://cdn.sqhk.co/kikutajaz/hhgichn/gidubazilusawelekijuridi.pdf
    • https://static.s123-cdn-static.com/uploads/4374954/normal_6006a43fef18f.pdf
    • https://cdn.sqhk.co/dewavasese/hgf2mhg/woodbridge_apartments_wylie_tx.pdf
    • https://cdn-cms.f-static.net/uploads/4368237/normal_6026473898f3e.pdf
    • http://sbrf.link/amorous_adventures_elisif_guide1rsk3.pdf
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5fe0fd4a23998.pdf
    • http://alifan.store/12441536381bnl1r.pdf
    • http://load-bcp.com/chrome_remote_desktop_for_pcnhp5z.pdf
    • https://cdn-cms.f-static.net/uploads/4426075/normal_603e7fb213152.pdf
    • http://salonvarna.com/95478081948unlsu.pdf
    • https://cdn-cms.f-static.net/uploads/4473632/normal_60517947d934b.pdf
    • https://cdn.sqhk.co/momujolo/NDiiytt/pathogenic_contamination_get_rid_of.pdf
    • https://cdn.sqhk.co/sirepajaku/jgeqSzC/drop_ball_soccer.pdf
    • http://dvestideyli.xyz/22284066717lk8vz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujapu/dialogue_rules_worksheet_and_writing_assignment_answers.pdf
    • https://s3.amazonaws.com/gateme/do_you_feel_how_i_feel_lyrics.pdf
    • http://veduredetud.epizy.com/how_to_repair_howard_miller_grandfather_clock.pdf
    • https://s3.amazonaws.com/lonozote/9181851620.pdf
    • https://s3.amazonaws.com/pezofut/owners_manual_honda_accord_2016.pdf
    • http://medozazi.epizy.com/habanera_from_carmen_violin_sheet_music.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_off00010ab1.bin
867e243f06d886f428779be572dcfbb8e075ffbc0da7d6636580427deab2ce95
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 5332 bytes
font_01_sfnt_off00011cd0.bin
b954baaa303f3541998b917449316c765b6c7921fc8a20764b70165bb7d9085f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 11488 bytes