Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3722d4cc6361abf…

MALICIOUS

PDF

69.8 KB Created: 2021-02-24 22:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6cab9d546e12ee56e4a95124c148da35 SHA-1: a93ff064e6155bf0a76d14befe2fcf832688d384 SHA-256: f3722d4cc6361abfa4e6c298af6a3cc309de4709dbd33d392c418c6780236342
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body and embedded URLs suggest a lure related to 'unblocked games' or search results, directing users to various disposable domains. The presence of multiple external URIs and link farm heuristics further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=head+basketball+unblocked PDF link annotation
    • http://tupaxeguna.scienceontheweb.net/how_to_find_all_gmail_account_by_phone_number.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/baby_goats_bouncing_on_trampoline.pdfIn PDF document text
    • http://hook-up.fun/sheldon_axler_linear_algebra_done_rightjs6s1.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/nuptial_knot_meaning_in_urdu.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/nexotuxebakiratogatotij.pdfIn PDF document text
    • http://fezedemolor.22web.org/22931973438.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/zawujalixenow.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/primal_strength_power_rack_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukotig.rf.gd/47517108004.pdfIn PDF document text
    • http://gafodix.myartsonline.com/jisululotagituj.pdfIn PDF document text
    • http://zezunas.epizy.com/lundbergfretagen_annual_report.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/nosinobivivimezir.pdfIn PDF document text
    • http://vizebafep.epizy.com/time_me_am_pm_ka_full_form.pdfIn PDF document text
    • http://vuzozan.epizy.com/42871025953.pdfIn PDF document text
    • http://nibewisule.epizy.com/60050508710.pdfIn PDF document text
    • http://pujumek.myartsonline.com/divemog.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/94126066473.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_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5000 bytes
SHA-256: 2fad3e1ebbefdf0a96cc8144522d98c7369be2b96664cb4b330e69d71eb5073b
font_01_sfnt_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 10012 bytes
SHA-256: 0ab2903c494683b04cc5b1656fb534283e03f0103ee5414263951e0e529d0706

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