Malicious PDF — malware analysis report

Static analysis result for SHA-256 0063e07d7fcca3aa…

MALICIOUS

PDF

79.3 KB Created: 2021-03-16 11:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7f49889be173f2a167c63cfb6b3723dd SHA-1: e84569377ba148ff1e46ef3b93c0e87ff12eec7e SHA-256: 0063e07d7fcca3aab733fac9b1836e5a9545dda86ee9aad584d55022af2269ec
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. It contains an embedded URI pointing to 'dugedepap.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to educational content ('Cubes and cube roots class 8 worksheet'). No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest this PDF is used as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/123?utm_term=cubes+and+cube+roots+class+8+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480590/normal_5ff38c8dba667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_6048be93a5074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5ff9028447ae0.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/ia7ZPTw/76502728056.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/fwghnia/strategy_training_courses_in_nigeria_for_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/he7jjgj/evacuation_map_sonoma_county.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_602b6890a7451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6032ff91129b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5fde72539c953.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/alvSIJ9/fall_toddler_boy_clothes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_604d263a26f02.pdfIn PDF document text
    • https://cdn.sqhk.co/nelenikarate/X89gfLG/patazizariguwigodurewed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_7a62a89f08014878a3edd5d4d93af873.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_1c304e0b3b7a48ae8c2e805d075b751b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/secret_video_recorder_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/my_husqvarna_backpack_blower_wont_start.pdfIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_3c6c9a8afa71437eafe9f58dca3f0371.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/frantz_fanon_quotes_wretched_of_the_earth.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_55b4a5643887402fb4f249e4ad9f5cfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/is_triage_a_french_word.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_13df481ee6f943eba4e3bae0334ce3f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/87373612448.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 5424 bytes
SHA-256: a1365d505ed8b1ba43511f90abe68111162c865a21b6cce00fcb1a6131dcfec6
font_01_sfnt_off0000f30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 11228 bytes
SHA-256: 1bbeb633321827e394aa1b3dbe1d3e9d7b0466ec0c7df8633bc9660527c02876
font_02_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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