Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cab5043cc8a98d…

MALICIOUS

PDF

81.5 KB Created: 2021-03-09 09:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaa8532d13bc00935046b4baed480129 SHA-1: 1342f14bae005736e80af891b3f3782ddb50b8d9 SHA-256: 40cab5043cc8a98dae4321dca6fb99fa0cadea15498685560fc51c3cf5dafa4a
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, with a high risk score. It contains an external URI pointing to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains a title suggesting a lure related to legal matters, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=how+to+get+out+of+a+marriage+contract
    • http://dakisemakegag.sportsontheweb.net/avatar_comics_imbalance_read_online.pdf
    • https://cdn.sqhk.co/levowexesu/5UkghLB/field_hockey_sticks_for_sale_south_africa.pdf
    • http://polfact.site/samsung_un32j4000_power_cablem8jmw.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fd80740bf61e.pdf
    • https://cdn.sqhk.co/pitekofotada/h39gdZ7/skin_editor_for_minecraft.pdf
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/fevirar.pdf
    • http://repair-foto.ru/500446566518oa4o.pdf
    • http://price-list.moscow/varugum6crqt.pdf
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/likenejoj_sezimob_xisoxidanebu_ligoruxoba.pdf
    • https://cdn.sqhk.co/xuvisisitinu/aCjigf9/samsung_frp_calculator_code_not_working.pdf
    • http://zumewidife.mygamesonline.org/toshiba_satellite_l750_drivers_windows_7_32_bit.pdf
    • http://tipografiyav.moscow/zesejofatutemokoborilagrx52.pdf
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/96f4d4.pdf
    • http://bumawusuka.mypressonline.com/how_to_hand_score_the_basc-2.pdf
    • https://cdn.sqhk.co/dolubivo/2mghsIa/nfl_playoff_fantasy_football_draft_cheat_sheet_2019.pdf
    • https://static.s123-cdn-static.com/uploads/4384640/normal_5ff5e9a4ab200.pdf
    • http://gutprod.xyz/wotidotso6sz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pexodugosa/99124246310.pdf
    • https://s3.amazonaws.com/zijivevip/escape_room_mystery_word_level_38_answer.pdf
    • https://s3.amazonaws.com/womirofop/gana_achu_new_song_2019_wapwon.pdf
    • https://s3.amazonaws.com/sevoga/driver_acer_aspire_mc605_win7_64bit.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/apple_itunes_12._9._6.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_off00010261.bin
d4d1085deb0ddd891b378784d78cb953d330d7534c0389e84491a53835d9af4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 5044 bytes
font_01_sfnt_off00011390.bin
f772a6b7ecf3ac25672f352627c7b7cab00abdc6cf91dd0c98cdeaf17ab35f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11390 10896 bytes