Malicious PDF — malware analysis report

Static analysis result for SHA-256 75469b0a2fb55d63…

MALICIOUS

PDF

80.1 KB Created: 2021-01-24 02:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b3ddb1c7e57b3e68a2d306136cc6b058 SHA-1: eb9b878593ed10a771c3ed2417cfd7bd36e9d106 SHA-256: 75469b0a2fb55d63595024863d371562ee27a8874d6cf336b7c68d9879c77e04
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links pointing to external domains, suggesting an attempt to redirect users to malicious websites for credential harvesting or further payload delivery. The document body, though heavily obfuscated, contains references to 'nba 2k13 cheat codes pc', which is likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=nba+2k13+cheat+codes+pc PDF link annotation
    • https://cdn.sqhk.co/lejesapazud/UmMkgcd/offroad_racing_buggy_review.pdfIn PDF document text
    • https://site-1178208.mozfiles.com/files/1178208/evansville_teachers_credit_union_loan_payment.pdfIn PDF document text
    • https://cdn.sqhk.co/kugeturo/6J7Fgfc/my_baby_virtual_pet_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/8qVWjhd/rock_radio_station_los_angeles_ca.pdfIn PDF document text
    • https://site-1177683.mozfiles.com/files/1177683/mini_dash_cam_garmin.pdfIn PDF document text
    • https://site-1222023.mozfiles.com/files/1222023/volurisasabarumi.pdfIn PDF document text
    • https://site-1178278.mozfiles.com/files/1178278/43624820401.pdfIn PDF document text
    • https://site-1178794.mozfiles.com/files/1178794/vetizomuvesajedaki.pdfIn PDF document text
    • https://site-1228080.mozfiles.com/files/1228080/43528758932.pdfIn PDF document text
    • https://site-1177701.mozfiles.com/files/1177701/lavog.pdfIn PDF document text
    • https://site-1173778.mozfiles.com/files/1173778/tarif_retrait_orange_money_senegal.pdfIn PDF document text
    • https://site-1174183.mozfiles.com/files/1174183/dual_survival_cast.pdfIn PDF document text
    • https://site-1171149.mozfiles.com/files/1171149/pafasisulawir.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/vitelitubovuluj/larson_storm_window_installation_guide.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_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 5552 bytes
SHA-256: 19e637697355c0b9c424848b1d71e3922a45ef980f2fdcd63b1fa6e1af4d48b8
font_01_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 11344 bytes
SHA-256: 396d41f0c94fa9b4303baa98eef029003edd5ca24b827b2c47ce1a5c8a3d9b9a

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