Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c8dd4fc56bd020…

MALICIOUS

PDF

190.6 KB Created: 2021-02-13 15:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2e24c428c9c12136ac776c60cf7fa236 SHA-1: 1c8ba2205ac3edf98581e6697deadbf3c61e6502 SHA-256: 72c8dd4fc56bd0201a2f9929a236c89e77f8c4e8987f45dd320e192ba32706c7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to educational materials, aiming to trick users into clicking malicious links.

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://leonvi.ru/wix?keyword=glencoe+algebra+1+4-2+word+problem+practice+answer+key PDF link annotation
    • http://lg-supportteam.com/bopatusuguswe94o.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hjFgWia/73575384616.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/9086857.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/Nggfji6/flip_or_flop_vegas_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/gchcgdl/20393444173.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/hcjeagS/kupobatuxat.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/vutixewufovosax.pdfIn PDF document text
    • https://peneredexamoje.weebly.com/uploads/1/3/1/4/131407565/13916a.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/hegd1v0/kadirenukavuzonojekane.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/relanisowata.pdfIn PDF document text
    • http://moymagazin.xyz/hario_mill_slim_manual_grinder7g7e7.pdfIn PDF document text
    • http://m-ryanaf.site/21100306291wa5h4.pdfIn PDF document text
    • https://pomujitumigo.weebly.com/uploads/1/3/1/8/131857402/27c0aa2910.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/96a4664712a4b.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/eLRigih/f1_2016_season_review_dailymotion.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/UnGhggi/the_galaxy_survivor_mod_apk_latest_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foligebo.rf.gd/15353842850.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_off0002b343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B343 6124 bytes
SHA-256: 42759dc8653d3b1af1af583a431049203bdbf0a32b01f27a35c59803541b33d8
font_01_sfnt_off0002c82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C82B 10636 bytes
SHA-256: f68eadc71f7111a4d021d3da6670f72898412c31666386b11173253a1a3802cb

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