Malicious PDF — malware analysis report

Static analysis result for SHA-256 238245b8133d7294…

MALICIOUS

PDF

71.4 KB Created: 2021-03-14 01:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7e8f5ac665c1ebc8f5148ba57b1e6378 SHA-1: 9388294099e57a0929fe17a5fc51de4d075d905b SHA-256: 238245b8133d72940b0707756342264738b8ddf7e966c2d09890690c3c47c843
146 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to link farms or disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'SE_QR_LURE' indicates the document likely instructs users to scan a QR code, a common tactic in phishing campaigns to redirect users to malicious sites or download malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/wix?keyword=qr+scanner+apk+mirror PDF link annotation
    • https://cdn.sqhk.co/dejijadu/4Nihjjc/55653261091.pdfIn PDF document text
    • http://expo-kit.ru/how_to_be_good_at_actingm1rgn.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/cjiK9gj/tower_conquest_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/FLShdhi/97890027457.pdfIn PDF document text
    • http://kellys.space/how_to_use_dymo_letratag_2000g3ef8.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/YUTJHD1/green_bay_weather_forecast_14_day.pdfIn PDF document text
    • https://cdn.sqhk.co/xexogataza/hia5sjb/movies_2020_comedy_romance.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/qhbjjP7/certificate_of_good_standing_prc_form.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/bRjjgc5/danepolo.pdfIn PDF document text
    • http://xexogafuko.22web.org/monark_cycle_ergometer_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/3hfifHp/83312339692.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/Znhghjb/step_by_step_snake_puzzle_shapes_instructions.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/legesiliv/11476215559.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/75287319375.pdfIn PDF document text
    • http://luvoxijamubisur.rf.gd/keurig_rivo_cappuccino_and_latte_system_manual.pdfIn PDF document text
    • http://mezajunezu.rf.gd/mosisanofoba.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/niruzixeruwok.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/bein_sports_live_free.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/place_value_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/69714238449.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/transformar_de_binario_para_decimal_em_c.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/axel_f_sheet_music_alto_sax.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_off0000d906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD906 5172 bytes
SHA-256: 3313002a5179b219fcffefc8e6dced79b96313991bbdfcc54b7c97006743a522
font_01_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 11080 bytes
SHA-256: 5b573797d0c61c57cb783615ffcc0f90cf1c57d99b13a0c29d8c9d8cc2ee85e3

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