Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed217b8cda97d111…

MALICIOUS

PDF

124.2 KB Created: 2021-02-14 04:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3cd16ac78b0ea04d49763af4190f2573 SHA-1: 005a228076d9126ae57569e2f43ec0daab7e4a92 SHA-256: ed217b8cda97d11174f65a3620cec0adbdae1dac0b5e17c171951a31b1cb28ca
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=super+mario+manual'. Additionally, ClamAV detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of a malicious URL within a PDF strongly suggests a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/123?utm_term=super+mario+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4385436/normal_5feb2bcae8c60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fedd01a4f705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447095/normal_5fcaeba80d4b2.pdfIn PDF document text
    • http://requiremcgood.com/gisazikasubitaxizugifanuzv1n5e.pdfIn PDF document text
    • http://alteramaks.world/h_k_letter_whatsapp_status_video30k4v.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/11555228215ibiod.pdfIn PDF document text
    • http://smartcreditcheck.info/caramel_frappe_mcdonalds_nutrition_information71785.pdfIn PDF document text
    • http://natbeach.space/big_baby_dram_cha_cha_beyoncedsumn.pdfIn PDF document text
    • http://55571.ru/manual_of_laboratory_and_diagnostic_testsfohu0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_600e23d3e7a75.pdfIn PDF document text
    • http://istlan.space/supernds_nds_emulator_iosz2lw5.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/mekonulegipero/wobexufotujiwem.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/3d_animation_software_free_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/auditor_general_report_2018_petrojam.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/overwatch_aimbot_ps4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/56140406097.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/arabic_calligraphy_fonts_for_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/funny_mind_blowing_riddles_with_answers.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_off0001aa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA2F 4888 bytes
SHA-256: c171cb4b7a3cfe87657164b805e4b0b3047b1311777e884dcc9f58b5f6334ad2
font_01_sfnt_off0001bab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAB3 12012 bytes
SHA-256: 5351ceb2268d59afa42f38189df6f32b1330a50520307b3e06a15a6491cc1bc2

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