Malicious PDF — malware analysis report

Static analysis result for SHA-256 3124a186f5df13da…

MALICIOUS

PDF

82.1 KB Created: 2021-03-28 07:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f14d3c03381854423ce96c15d3ce1a47 SHA-1: cc00be3f2fa207c965a7301fff3d399dc768edc2 SHA-256: 3124a186f5df13dad9c32a0e59162e0a3a1a474c45453ab48cc3a514c9478294
184 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary URL, 'https://xajibur.ru/strik?utm_term=fix+corrupt+ntuser.dat+windows+10', is presented as a solution for a corrupted Windows file, a common lure for technical support scams or malware delivery. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://xajibur.ru/strik?utm_term=fix+corrupt+ntuser.dat+windows+10
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/f5d9978757.pdf
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/povibazabutup.pdf
    • https://cdn.sqhk.co/goxufime/lghghJD/formula_1_qualifying_tire_rules.pdf
    • https://cdn.sqhk.co/sobexofap/2iftW3S/how_to_install_zombie_apocalypse_mod_sims_4.pdf
    • https://cdn-cms.f-static.net/uploads/4417658/normal_60395b1d1f834.pdf
    • https://tilavulam.weebly.com/uploads/1/3/0/7/130739056/kigoxubup.pdf
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/bofezogot.pdf
    • https://cdn.sqhk.co/vadezewe/icgguIQ/kick_the_buddy_hacked_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4491169/normal_602fc028b6844.pdf
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/ec4070bf3d9c944.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_9bb4c6f60aae4077a0e475539fcee514.pdf?index=true
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_239f80c81fe4431a81be3822179db6de.pdf?index=true
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_8db8797da154415dad8033f5c707cb9e.pdf?index=true
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_a48d2d6739284dd3a055165381b020ed.pdf?index=true
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_b79472dfc1a441b4a241ec306eb8a8d1.pdf?index=true
    • https://s3.amazonaws.com/gedexim/web_services_aptoide_apk_install_dream11.pdf
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_71a1dc50d731425c932ef74eedcffafb.pdf?index=true
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_f77033e2361642a0ba38dbf35a97a2e0.pdf?index=true
    • https://s3.amazonaws.com/bitizopovopaso/formal_letter_template_ks2.pdf
    • https://s3.amazonaws.com/pulavokaxe/nadeluma.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108d6.bin
05fa0e6d931b19f4767ebbb520fa23818fdd4c7f0a5c5d9fd59f59b242786d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 5376 bytes
font_01_sfnt_off00011b53.bin
fec785f51e58a85a15d7126aee09ff51390b7cb37fb7341eb4d9761be9162a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B53 11032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.