Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc77a44c79ca1e9…

MALICIOUS

PDF

78.7 KB Created: 2021-03-28 18:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7368e4d1a274055d15c2d27016df88 SHA-1: 286057476b744b9c2ff694b7b24554e26d01b514 SHA-256: ffc77a44c79ca1e9e77c06cf6649b718e4e2bbac8493ac37f8921213e9d591b7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a search result lure for a product, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=best+manual+tortilla+press
    • https://cdn-cms.f-static.net/uploads/4404123/normal_605520e339ed8.pdf
    • http://goossyy.online/u_pic_a_part_near_mebc0ed.pdf
    • http://kibizife.iblogger.org/87246997260.pdf
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fda89f5e81b6.pdf
    • https://cdn-cms.f-static.net/uploads/4415935/normal_604ca9f09b580.pdf
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fd62af5b5ec2.pdf
    • http://reliables.ru/xadirakekagigunivosam712j.pdf
    • http://vehicleusains.com/john_dewey_experience_and_educationq5pni.pdf
    • http://bimosoxadiz.22web.org/98778498109.pdf
    • http://znakomstva69.space/fundamentals_of_heat_and_mass_transfer_incropera_7th_edition_solutions_manualvxkev.pdf
    • https://cdn-cms.f-static.net/uploads/4412767/normal_605ee20f86f17.pdf
    • http://rifijetuvijilam.medianewsonline.com/mezoreximodiwixetodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jovozovoxisuno.epizy.com/how_to_replace_kenmore_oven_igniter.pdf
    • http://nozixexegaliwe.rf.gd/biochemistry_review_book.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/dilitemujinafuforetawo.pdf
    • http://tofalit.myartsonline.com/kuvej.pdf
    • http://remigesej.epizy.com/pisazajevimafelokaroremi.pdf
    • https://s3.amazonaws.com/novifamigot/mr_heater_big_maxx_horizontal_vent_kit_instructions.pdf
    • http://fufudaloxola.onlinewebshop.net/contexto_social_definicion.pdf
    • https://s3.amazonaws.com/mokamoba/pujazarosupazivoxinasotiv.pdf
    • https://s3.amazonaws.com/batiku/40958363206.pdf
    • http://vubuzixefixa.onlinewebshop.net/spencer_kagan_cooperative_learning.pdf
    • https://s3.amazonaws.com/rafiralexezol/chaos_theory_various_artists.pdf
    • http://resilasijajatil.myartsonline.com/did_they_ever_find_the_missing_argentine_submarine.pdf
    • http://ravuxisopol.rf.gd/79987922763.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b4.bin
f56ce133cbb6609724525527ab45716b72fd3ef10a90d718ae8faa6c8d389cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B4 5016 bytes
font_01_sfnt_off000108a2.bin
928c64d66f0c63757f641dc7000daca7f851dfd578181c518fd67de34f3a65f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 10756 bytes

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