Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5443ecf3042e2a…

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 05:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6776911d17fa3083a2507192f05d580d SHA-1: 212f07f3fe6e63cb1266ee764c7c1289eee03dc7 SHA-256: 3e5443ecf3042e2a21c33cc5692a7c539e82df3949e022302a8f9731ec1301e3
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting or unknown reputation sites, suggesting a link farm designed to redirect users. The document body, though partially corrupted, suggests a lure related to creating PDF files with images, likely a pretext to mask malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=como+crear+un+archivo+pdf+con+imagenes+gratis PDF link annotation
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/c750e05f8f7b.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/aromatic_heterocyclic_chemistry.pdfIn PDF document text
    • http://lurodug.iblogger.org/atrocity_act_1995_in_marathi.pdfIn PDF document text
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/fenumobidu.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/jibibolumetujijarivese.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/biomass_power_plant_process.pdfIn PDF document text
    • http://sefesojobibif.iblogger.org/85998275461.pdfIn PDF document text
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/jorofodojuteti_luxiruwovib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posufij/grooming_a_westie_guide.pdfIn PDF document text
    • http://luwatejanif.epizy.com/mcgraw_hill_answer_key_algebra_2.pdfIn PDF document text
    • http://zijedan.atwebpages.com/68613062208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e141bb-000e-45f5-bb51-cf2629b04575/43849181012.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_56beb2cfd2574706afcb952d8f9a65a1.pdf?index=trueIn PDF document text
    • http://lanutovomet.epizy.com/rewesenenuje.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/at_the_cross_hillsong_guitar_chords.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_4802664af7ff40a7b31af669af623815.pdf?index=trueIn PDF document text
    • http://xonizud.epizy.com/35750673697.pdfIn PDF document text
    • http://pidusagi.atwebpages.com/loxaxatakezovabuno.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_518bf9097f7d4794b715f07533fc8b85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/46923431177.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/best_astrology_application_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531d14b2-8f58-41ae-b6db-d5de7da849c1/noxukanavewe.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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 5504 bytes
SHA-256: 24f84cc8fd3eb18b7634311af8d08bf723ab45b515e89a0aeb904907b87613df
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 12304 bytes
SHA-256: 49a71973b9cbbeaa01a3748409980f7aba66b8dfdfbdbc7b7437d13d48e1a454

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