Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0a9f6e991dcd73…

MALICIOUS

PDF

75.3 KB Created: 2021-03-21 22:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 57a85a7a0f8fe56894895598346f4056 SHA-1: 2520d51b506d8fdc79201dd28172272d355004f2 SHA-256: 3f0a9f6e991dcd73523d8cbe4a0c0cef1dbf05d1707fa8a0513e4994c53c9739
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to drug dangers to entice users to click the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=bahaya+narkoba+bagi+kesehatan+pdf PDF link annotation
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/6998567.pdfIn PDF document text
    • http://yazansoft.com/microelectronic_circuits_7th_edition_onlinekbgx5.pdfIn PDF document text
    • http://kurs1.xyz/olympus_om2_user_manual6s9as.pdfIn PDF document text
    • http://sputnews.com/gt_mountain_bike_wheel_size_chartm1kgk.pdfIn PDF document text
    • https://dugaxopi.weebly.com/uploads/1/3/5/3/135305828/a2a970b61.pdfIn PDF document text
    • http://lyudi23.ru/jawak3ebwc.pdfIn PDF document text
    • https://zebomutob.weebly.com/uploads/1/3/2/6/132696512/6fa3f22d8825a5b.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/eijie2i/pixemufefuka.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/giWujhK/zudok.pdfIn PDF document text
    • https://cdn.sqhk.co/xiselaza/XqW9Sij/sefulivananasen.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/zogobonig_jakivivuku_mudimiw.pdfIn PDF document text
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/19859df77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/anomalia_de_ebstein_en_adultos.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/24625412188.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/91120642613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1583142e-26d9-468e-a29a-7efad0f8fc0b/under_the_dome_season_4_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05807e99-b9ee-4fc8-8c25-ad496ef909fb/11217138232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05869e74-ba48-4dfc-a8ac-98aa4257ad4a/monster_girl_maker_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884ccbd4-89e1-4be6-b79c-648e2e0aea19/81401232069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481db9b7-0165-45e8-957b-73566f4abb82/gumamiwenuli.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/31604741190.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/regopapokuwobedibogemuwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/32481165546.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/minecraft_launcher_free_cracked_1._8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5624 bytes
SHA-256: fa6f135bd8b4d713959c287c00cf205d05d3df9b7dbe062e5da6e213130687fb
font_01_sfnt_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 10196 bytes
SHA-256: c4ba80644fb107653f47471573dc294e988c558f7110dea3de47ef5c3a6773db

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