Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc19db50208385a…

MALICIOUS

PDF

70.5 KB Created: 2021-03-18 22:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 00cd041691deca461b86772a650a3fd7 SHA-1: 6b7e2fef31d7010332312c26524bf3b29bd01cd5 SHA-256: 0cc19db50208385a53c916731d40c019194928d448c309692e3b3e8aeb3251c5
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 directs users to a suspicious domain, likely for further exploitation. The document body, though heavily obfuscated, suggests a lure related to 'math properties worksheet pdf'.

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://resalured.ru/wix?keyword=math+properties+worksheet+pdf PDF link annotation
    • http://sakulog.sportsontheweb.net/2004_vw_touareg_transmission_fluid_type.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/eaGYiiw/commodity_cotton_price_live.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/43769469501.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/gAiijbV/the_farmer_s_dog_commercial_beethoven.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/sotugijilumiseta.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/3jcicjj/14315246219.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/tosego/39984113908.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/pablo_alboran_quien.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c43e802-ec05-4ae7-9c8d-4238f42ee937/dezejifilokawufidanezev.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/ebay_usa_phone_number_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf65fb82-8c6e-4fba-9113-b07128f504b4/gejukafuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/54324923114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fbf656-e776-48b5-9fc9-31a69af3c5a7/libipovivojuzabipoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d42c5f9-d6d2-4e2d-b206-7e537821bac8/jolite.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/jilediwupaxazal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812ed0e9-8b94-4f9e-93da-af3cd82bd672/ximojakox.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/winter_serenade_yamaha_piano_sheet_music.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_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 5256 bytes
SHA-256: cc360d8a9d5f14dae287040ef2691cb0a63676ce670f2bd67f12371efc4a8c53
font_01_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 10608 bytes
SHA-256: a3175924f9df63efcc58dad55bd5c9aed6461d1af04da8b515dc2105fcd377ae

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