Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fde44e95cdfd89…

MALICIOUS

PDF

84.7 KB Created: 2021-03-18 21:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 665b5dcfe453eb5418ccaae78989f516 SHA-1: 7f80aa987e2c9a8d172f61b8e6082345d116b1a9 SHA-256: 79fde44e95cdfd8925827fa55ce3346909beb395ac4a3b8e7e24993a7f911bf3
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. ML and ClamAV heuristics strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to educational content, likely serving as a lure.

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://golowaki.ru/wix?keyword=realidades+1+capitulo+2a+answers+page+33
    • http://wtia.space/math_puzzles_for_middle_school_worksheetso8wha.pdf
    • http://tideparipawovu.mygamesonline.org/xosejevipomonaxonolagipa.pdf
    • http://meine-gebuhrenfrei.com/23032664449hpb1g.pdf
    • https://cdn.sqhk.co/xiwasazafu/wfKUnib/kifofez.pdf
    • https://cdn.sqhk.co/mujekesire/jjthamg/90148914622.pdf
    • https://cdn.sqhk.co/bafiweba/diejgVY/monster_bingo_orchard_toys_instructions.pdf
    • https://cdn.sqhk.co/pimupigedu/jdrZX2h/lifeafter_game_recipes.pdf
    • https://cdn.sqhk.co/zipodumup/hciKk1m/81360331584.pdf
    • http://prodson.fun/download_lagu_coldplay_terpopuler5ae0u.pdf
    • http://prizinsta.info/42574720479hn0ny.pdf
    • http://formblckr1.xyz/is_catch_me_if_you_can_based_off_a_true_storyz7kxd.pdf
    • http://nuverlites.online/fulurodarifuvomurogu3v4b9.pdf
    • http://kemamibuke.mygamesonline.org/35071793460.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6b2d2f21-e92d-415b-8b3d-56f821b12e74/27483281190.pdf
    • https://s3.amazonaws.com/kubedukowug/prepositions_exercises_with_answers_for_class_10_icse.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/40773257457.pdf
    • https://uploads.strikinglycdn.com/files/78780d4e-7c4c-4525-9a1e-cc03d9adb625/1632718301.pdf
    • https://uploads.strikinglycdn.com/files/73e6d463-3ef2-4248-8906-6b05c63ecb08/how_to_dye_hair_evenly.pdf
    • https://s3.amazonaws.com/puretulenuza/8624439244.pdf
    • https://uploads.strikinglycdn.com/files/0354b879-36ae-400a-9161-19c8e80d538f/wudiluf.pdf
    • https://uploads.strikinglycdn.com/files/73dd9d33-b6c8-4a77-854b-639f283d6073/what_is_the_purpose_of_a_prayer_labyrinth.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_off0001098d.bin
09336d1a77e292fab5e15d0a00e8f1768478a971e5385139fe03869c5a99eef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 5688 bytes
font_01_sfnt_off00011d1a.bin
e4461fae47bc23e709f2bbb6f0437ee4bcff9f925d9577de5967b6b908f0011a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 11492 bytes