Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ec481f070c4003…

MALICIOUS

PDF

75.5 KB Created: 2021-04-23 03:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e01b00e16cb315f4de9894bedd119f1 SHA-1: 7b8d98a719acdaf6f23a7dceb64f7c56c717d65c SHA-256: 99ec481f070c40030c79eac5d963b998e00713571f6476c2b3ff560b46c23c86
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, contains text related to 'anointing oil' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=how+to+apply+the+anointing+oil
    • https://cdn-cms.f-static.net/uploads/4412154/normal_6014927a23597.pdf
    • http://zajiledafalam.getenjoyment.net/spanning_tree_protocol_configuration.pdf
    • https://cdn-cms.f-static.net/uploads/4447436/normal_602f691111dc3.pdf
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdf
    • http://nebatomefov.scienceontheweb.net/57818673472.pdf
    • http://tebogekememesij.mygamesonline.org/7981911614.pdf
    • http://watomidipokaki.22web.org/68387210450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_a667e1836ddd429394b7181a8da64535.pdf?index=true
    • http://vovajixavago.epizy.com/bad_romance_piano_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/9b7e0054-b32c-4b3b-ace8-b713428889f4/29399040506.pdf
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c1b247848bde4598b4ae2aa4fdf2afe9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6c4ce83b-fb95-402f-8495-bcf727d415f5/are_great_dane_puppies_aggressive.pdf
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_fde9fed174a94b068380a7fa635f55b2.pdf?index=true
    • http://loxipov.rf.gd/60631656178.pdf
    • https://uploads.strikinglycdn.com/files/67220676-52c2-47c8-bd19-a7efc52c7648/rumejavifojenesotuximap.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_025219ccdbcb4ea7bcbf80471671206c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7d4251fc-61d9-4595-956d-03acd1c91b57/mifagebolapabarimad.pdf
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_a0f0b30da0a54b67858fcc5a1c48ebf1.pdf?index=true
    • http://bibikefogive.epizy.com/401k_enrollment_form_template.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_off0000ea75.bin
23865b9e92b9059e5c58677fbc131b95409e9ff721b9bc9714b9ba22178fd971		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 4960 bytes
font_01_sfnt_off0000fb72.bin
4070a73a91289dcc4101b852609a7ac4c1709787d505e12fe085adacef22060f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 11028 bytes

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