Malicious PDF — malware analysis report

Static analysis result for SHA-256 2345cc4b782db9da…

MALICIOUS

PDF

79.8 KB Created: 2021-01-21 04:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fe3e1e39d4114fde04c1ccfb1cbe505a SHA-1: 716aa2869988add2a102e15dfc0866598095b85e SHA-256: 2345cc4b782db9da2eae5027cf09a3c17489fb558470f68688091ba441ed3c50
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Test of genius worksheet answers'. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded URL likely serves to download a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=test+of+genius+worksheet+answers+b-78 In PDF document text
    • https://cdn.sqhk.co/minamojazi/NhjZihE/only_one_of_kpop_ages.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/qPieBUP/space_movie_1992_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/BRjevPQ/ar_effect_apk_xda.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/hgqX7C1/68469607002.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/drYQhgb/wordpress_ecommerce_templates_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/gddggBb/peluvu.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hchgjaO/64078289562.pdfIn PDF document text
    • http://busevabafumoje.iblogger.org/danerevoxigeguwe.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/jfvOeCe/pictures_1_to_100_prime_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/7wSEYim/i_wish_you_were_here_with_me_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/Tyggicc/find_friends_app_iphone_ios_13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wozawexopad.epizy.com/79730496279.pdfIn PDF document text
    • http://fixobijuruloluk.rf.gd/self_certification_sick_note.pdfIn PDF document text
    • http://nimozan.epizy.com/nitivuwurarezemus.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/film_butterfly_on_a_wheel.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/tabazoruvufakolu.pdfIn PDF document text
    • http://nidikofuwovi.rf.gd/99107531735.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/8472144548.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 5428 bytes
SHA-256: a0e61a77adeeb565953f4a69a0f1fa9e2d4c9e88ede96a150e8436ef98184e3b
font_01_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 10988 bytes
SHA-256: 378a6972a825cf80f583a72a84b732de36d1c90e97dbc8cc8a0bbef2353359f8
font_02_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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