Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0487348382e53a1…

MALICIOUS

PDF

82.5 KB Created: 2021-03-18 11:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7dc59e6a6aa00702bdeda8b741afb58 SHA-1: 990d038a0f4055877f89e9438434328fae9494d1 SHA-256: c0487348382e53a180ddbc538753ea23f3bc2570cbec8181db2a4e0cfe968d15
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a URL that appears to be a lure for downloading a workout PDF. ClamAV and an ML classifier have identified this file as malicious, specifically as a phishing trojan. The presence of multiple external URLs suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=women+s+beginner+bodyweight+workout+pdf
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/bulaxawadibo.pdf
    • https://cdn.sqhk.co/xakurusuk/7uWKicC/xotaxolabizododusadisev.pdf
    • http://phrensy.co/adidas_watch_adp6000_manualvqevy.pdf
    • http://boost-shop.xyz/vagosugefirurapabafuxeql53u.pdf
    • http://arendagg.xyz/wexevibaxexejikerifetinom142uw.pdf
    • http://0fruit.space/livro_animismo_e_espiritismotiilh.pdf
    • https://cdn.sqhk.co/busumodofu/gmdajg1/62873576896.pdf
    • https://cdn.sqhk.co/digubamot/ThfSgdw/bariwefanubadivosososajux.pdf
    • https://cdn.sqhk.co/posaleren/mP2gf3W/gwent_the_witcher_card_game_best_starter_deck.pdf
    • http://coupons2020.info/newujowap39g8.pdf
    • http://skidki-day.store/is_fox_nation_on_dish_tv8hqxz.pdf
    • http://letxxnx.org/81563294321tp8ch.pdf
    • http://ru-dev.xyz/jelly_bean_colors_and_flavorsyyo6c.pdf
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/6518289.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pifajipap.rf.gd/intercessory_prayer_scriptures.pdf
    • https://s3.amazonaws.com/mufukep/kavuvimasato.pdf
    • http://vunolipatebaw.rf.gd/45930287013.pdf
    • https://s3.amazonaws.com/piradi/where_can_i_watch_the_maze_runner_2020.pdf
    • https://s3.amazonaws.com/patilawasu/shark_ion_robot_r75_walmart.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_off0000f66d.bin
42ffe03f5a673f93f4f106e54d67afcb3244efb652f3c6a4784191d4a5fa5290
pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5504 bytes
font_01_sfnt_off00010913.bin
645522b07e9c0f60a9eb914f052445e65b70d66bbf5e2e9b36c4ffc005a8a6d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10913 11064 bytes
font_02_sfnt_off00012edd.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDD 4324 bytes