Malicious PDF — malware analysis report

Static analysis result for SHA-256 7888e43f217e4fd8…

MALICIOUS

PDF

76.7 KB Created: 2021-02-06 09:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dea1b975f74833006aac2b6f274e7bc2 SHA-1: 7bcb82776462393291e86a7b34dae0759516b5a8 SHA-256: 7888e43f217e4fd80c4539bc630639cd0e450a5af86c1652e185853b1a473557
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 link to a known malicious redirector, indicating an attempt to phish or deliver malware. The embedded URL `https://yafferge.ru/123?utm_term=us+army+military+leadership+manual` suggests a lure related to military documents. ClamAV also detected this file as `Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0`, further confirming its malicious nature. No scripts were extracted, but the presence of malicious URLs is sufficient evidence.

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://yafferge.ru/123?utm_term=us+army+military+leadership+manual In PDF document text
    • http://fredo.run/92064597447m9ijs.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/agighE6/the_mummy_returns_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/OHijthd/48978996155.pdfIn PDF document text
    • http://winsl.space/super_saiyan_4_vegeta_xenoverse_code3nlt0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456671/normal_5ff258e06e436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_6003cc1ab68d4.pdfIn PDF document text
    • http://securityverifiedservices.com/532459135cuyv1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fcc747ec3ab0.pdfIn PDF document text
    • http://dezlice.ru/3086308434916dc1.pdfIn PDF document text
    • https://cdn.sqhk.co/gogamosujimi/ifBiihd/best_halloween_decorations_near_me.pdfIn PDF document text
    • http://lg-copyrightforms.com/73245117117yjdtp.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/GjaXBjp/zombie_crashing_3ds.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/wazorixekunafob/2716849538.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/sc_st_caste_certificate_format_in_punjabi.pdfIn PDF document text
    • http://mifamin.epizy.com/tuxarosegedo.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/surprised_tom_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/beautiful_shayari_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/3842907831.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 5292 bytes
SHA-256: efb26f575544b77078e4bb779d6918447eeb620c82a9264abf76486767e5c682
font_01_sfnt_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 10256 bytes
SHA-256: 719a5fab492968749617d26dd4ac233f95beb20bb2bde7e560dac74180862721

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