Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f31d1dd84761f2…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 21:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1cd8f0cbb91f7937c520892e5266cc4 SHA-1: 7d0de7d23ea254baffab7db94402b1fe02c50017 SHA-256: 20f31d1dd84761f2224e30b562db07ec4e7585c3883792d45227fb33dfe96e20
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to a 'John Deere 4840 service manual'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=john+deere+4840+service+manual
    • http://stepka2016.xyz/how_to_pair_bluedio_t4_turbine_headphonesr9h94.pdf
    • https://cdn.sqhk.co/domuduxuro/hawjfii/237915558.pdf
    • https://cdn.sqhk.co/kimefutif/MhfjjDQ/spinner_chaos_battle_hack.pdf
    • http://sarhello.online/47152821954jrpdm.pdf
    • https://cdn.sqhk.co/jerivudofin/giigchd/wuwosevuzeniluvegoxivuw.pdf
    • http://pawarelubasiwu.iblogger.org/java_programming_tutorial_videos.pdf
    • http://manthoughtswebsite.website/98929817957l24yl.pdf
    • https://cdn.sqhk.co/nawamuzimosu/7heJqmG/tremulus_rpg.pdf
    • http://yourcy.com/m_audio_fast_track_driver_mac_download6zpzm.pdf
    • https://cdn.sqhk.co/nodewanase/jKbhjge/conseguir_diamantes_gratis_para_free_fire.pdf
    • https://cdn.sqhk.co/lakivasulis/djfWN29/block_strike_juego_online.pdf
    • https://cdn.sqhk.co/jasurisunav/kjhNCOd/40949575116.pdf
    • http://tunizunifegitof.66ghz.com/bululat.pdf
    • https://cdn.sqhk.co/numexerab/ggMjfni/11112736162.pdf
    • https://cdn.sqhk.co/wotedimozer/hig6gh5/gaboburogedulexokifapakik.pdf
    • https://cdn.sqhk.co/vigamodijek/UjjtZhg/the_game_of_life_vacations_ios.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://faxipobusevive.rf.gd/app_lock_fingerprint_pro_apk_uptodown.pdf
    • https://s3.amazonaws.com/poresi/sizurugubana.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/lipid_lowering_guidelines_2018.pdf
    • http://bubaregelore.rf.gd/48228164383.pdf
    • http://kipoluni.rf.gd/nattamai_720p_video_songs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f1.bin
fa0c5447e263fa341a5397d90cd1662792bf4d40d98777f78f370d2e89f51e1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 5456 bytes
font_01_sfnt_off0000f948.bin
f193b809a7d0672d631ad22a172177bbc86a5b0af8e80e0ec330dd3b647c26a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 11144 bytes
font_02_sfnt_off00011f65.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 4324 bytes