Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df370ebec89919c…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 19:23:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b64cf4678232af2a3ceb1f6f8233151 SHA-1: a140d38960e4ff29cb6a9622ba3a0f5ba5e5ebf2 SHA-256: 6df370ebec89919c9be4052454cde3d56f8087706de5a65ae0205de0ae1e4cae
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'dafemum.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and the presence of an external URL are strong indicators of a malicious document, likely used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=old+school+pizza+mineral+wells
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/1485845.pdf
    • https://zepagowixo.weebly.com/uploads/1/3/4/8/134887299/mediwizavut-gigas.pdf
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/goxezipatopa.pdf
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/4783942.pdf
    • http://tuzirawejaw.mypressonline.com/80244047547.pdf
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/nevidetiwatolopug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://degudodenotiva.rf.gd/cyber_security_awareness_training_army_answers.pdf
    • http://wetoxikilosawa.epizy.com/vupuwadexaxi.pdf
    • http://sosagid.epizy.com/89084160998.pdf
    • https://uploads.strikinglycdn.com/files/70fc9b22-5de9-43d1-95aa-9e9ef94599ce/91741738833.pdf
    • http://rejaramexalib.epizy.com/seamus_heaney_beowulf_old_english.pdf
    • http://pulitisagot.atwebpages.com/why_is_my_laptop_not_charging_on_my_docking_station.pdf
    • http://wuwemeno.rf.gd/nutakoti.pdf
    • http://viwukapatajomi.rf.gd/guvitaleloxevofibokuv.pdf
    • https://uploads.strikinglycdn.com/files/92c0de5b-d377-45d6-b734-4c32e7558d7f/69248975940.pdf
    • http://luzuzapubovug.rf.gd/comprehensive_english_textbook_for_senior_secondary_school.pdf
    • http://lutidufewujasa.epizy.com/zajutokusi.pdf
    • http://muxobuduxude.epizy.com/how_many_sex_offenders_live_in_california.pdf
    • http://mapesag.epizy.com/the_hound_of_the_baskervilles_in_bengali_download.pdf
    • https://uploads.strikinglycdn.com/files/dc5984b0-21c0-4c7c-b66b-3a95e43af0c9/jesus_healing_the_leper_verse.pdf
    • http://rinonefor.rf.gd/18684741275.pdf
    • https://uploads.strikinglycdn.com/files/e0a97e3e-e39a-4c3f-89cd-acbaaa047a75/frigidaire_range_parts_list.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_off0000f24f.bin
21d96ef535ea8de8c649595567af3f46d1ee579637523baf0201f2d239d71997		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 5480 bytes
font_01_sfnt_off000104dc.bin
9f1a53b05f2c6aed46631d100c09b658d91a7e1de59f8a3ae431874784b198f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 10252 bytes

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