Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df071deab7221b3…

MALICIOUS

PDF

74.8 KB Created: 2021-04-11 05:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e65b901db78afe29cc9b7efac575bb4 SHA-1: 9a5e2b193db36522520944618395badb2fb2e4a4 SHA-256: 6df071deab7221b3ee2cf5d21a8bda6a284a34efa1f8af8fbd0272217e4c78a5
154 Risk Score

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/strik?utm_term=what+is+the+strongest+economy+in+latin+america'. This URL is likely used to phish credentials or deliver a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=what+is+the+strongest+economy+in+latin+america
    • http://dujaliz.iblogger.org/esma_remuneration_guidelines_aifmd_2013.pdf
    • https://cdn.sqhk.co/sovokeduseb/7wQjcha/80076962875.pdf
    • http://texno3ua.com/64286408650vpmkf.pdf
    • http://buloshnaya.site/nelson_pediatric_symptom-based_diagnosis_free_downloadbma6x.pdf
    • http://doorstepcomputers.com/identifying_beginning_middle_and_ending_sounds_worksheetsiw1e7.pdf
    • http://wiinorama.space/petsafe_wireless_dog_fence_setupuxgsx.pdf
    • https://cdn.sqhk.co/nawakema/ciaidjd/diary_with_lock_fingerprint_lock_set.pdf
    • http://rapoxarawiwalo.sportsontheweb.net/90860397071.pdf
    • http://xonibiz.22web.org/what_are_examples_of_cognitive_dissonance.pdf
    • http://italysummer.space/xajerazutoresuwalaxugavkwzg6.pdf
    • https://cdn.sqhk.co/farafakilof/njcw4ha/orange_game_boy_advance_sp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/babetafaperaxov/pitapobatika.pdf
    • http://lusajafimaneru.myartsonline.com/wosexe.pdf
    • https://s3.amazonaws.com/lanaladu/binonojixusagifefij.pdf
    • https://s3.amazonaws.com/vojapu/97171295873.pdf
    • http://jigategire.epizy.com/xuxilisum.pdf
    • http://fuvovadujono.rf.gd/white_christmas_lights_with_white_cord.pdf
    • http://lakovejaduga.rf.gd/31267741154.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/calcestruzzo_precompresso.pdf
    • https://s3.amazonaws.com/dedinavesute/learn_how_to_draw_anime_characters_for_beginners.pdf
    • http://giwigevo.rf.gd/el_aprendiz_de_brujo_libro_gratis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47e.bin
f8229030d9e57281418cf53efec49e7a0a6b608f7268ef6645e6af1a82f4283b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 5328 bytes
font_01_sfnt_off0000f688.bin
b8955347aba6a287b3d968caef73e7edef01abda7c94bf5a5b99d8b7fb049269
pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 11840 bytes