Malicious PDF — malware analysis report

Static analysis result for SHA-256 296ac875dd7119fb…

MALICIOUS

PDF

78.9 KB Created: 2021-02-27 07:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abba1990bde66585990c29713bbef3a1 SHA-1: 7abb8cd080afc22a78375b3af57411150acf8bc7 SHA-256: 296ac875dd7119fb8a2cf3b9904cb7f4cb0e073f9653e4160025bfcc05d909e3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of URLs with 'utm_term=key+crack+visual+studio+2015+professional' strongly indicate a lure to download potentially unwanted or malicious software. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/aws?utm_term=key+crack+visual+studio+2015+professional
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/nakifuvezotel-gubos.pdf
    • https://cdn.sqhk.co/fekolisuzub/BgfVAhf/bunipixebunalati.pdf
    • https://cdn.sqhk.co/tupujokuz/BBPmgel/sanalixuzenaligoxik.pdf
    • http://sowoxapexemex.sportsontheweb.net/pugovawuwazukude.pdf
    • http://zunuruxeguxifi.mygamesonline.org/how_to_drain_a_portable_ac.pdf
    • http://leledup.mypressonline.com/409933989.pdf
    • https://cdn.sqhk.co/rasepotobami/FmibhjU/easy_wood_craft_ideas_to_sell.pdf
    • http://remontvorot24.com/flanders_conference_hotel_ielts_listening_answersfiieq.pdf
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/sijagajewixotolil.pdf
    • http://1pokypki.website/myanmar_tv_sport_apkpzl6c.pdf
    • http://kerutugizuxig.mygamesonline.org/11945263989.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xuxerutiwuv.onlinewebshop.net/jugixewe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e428.bin
48f5fa12b803252ada39d34ff211a689a088f0d69ba678a54fcb8ef2dbb4a1e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE428 5792 bytes
font_01_sfnt_off0000f801.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 1800 bytes
font_02_sfnt_off0001008e.bin
d2105a99f34928c1ab0bc0f54e8886cab044278216443376dd38d65003db270e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 14828 bytes