Malicious PDF — malware analysis report

Static analysis result for SHA-256 27415d4458647230…

MALICIOUS

PDF

80.9 KB Created: 2021-03-29 03:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3386a6396df07d438fdedaf2787183fa SHA-1: e8e8ecbf0051a6cfb3800e95ad735b5b2eccf5de SHA-256: 27415d44586472303223cfead9b66896654050912e6ad18882c968896b9ba2fd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://midufefew.ru/award?keyword=biogas+project+for+students+pdf', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to the URL, reinforcing the lure.

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://midufefew.ru/award?keyword=biogas+project+for+students+pdf
    • https://cdn.sqhk.co/wadusazilox/MAidjgc/pupen.pdf
    • https://cdn.sqhk.co/pamezuravuno/ggcVdQ0/arcade_classic_games.pdf
    • http://wetodikepo.iblogger.org/medical_biochemistry_questions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_2303c2e1bc154c3eb18c17c6d712ce98.pdf?index=true
    • http://juvokumepi.rf.gd/26989151715.pdf
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_70fae244f20d46418fb527e3f0a537d5.pdf?index=true
    • https://ed457e25-7262-4bf7-b769-9a3df1da8a49.filesusr.com/ugd/60ac0c_12702ed355ae446d895f6cac04ff3f92.pdf?index=true
    • https://s3.amazonaws.com/veledabejufi/29991820715.pdf
    • http://butasolijedaj.rf.gd/axones_mielinicos_y_amielinicos.pdf
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_fc883cb356874c63a6d3bb0a3dda959e.pdf?index=true
    • http://fusufovonezep.rf.gd/how_do_you_change_a_safety_first_thermometer_from_celsius_to_fahrenheit.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_cf0366d59e9840fc8a1203b5367eb1c4.pdf?index=true
    • http://gorefoverotiw.epizy.com/madame_bovary_1949_movie_review.pdf
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_580a540f5bf542a5ba0f9440b75e7eeb.pdf?index=true
    • http://satanomoxa.rf.gd/52921199475.pdf
    • https://s3.amazonaws.com/muxozuvalubi/98627545462.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_off0000fdc5.bin
703f47aed355162095b8036ca599cc500f7d9c7ade16051283e91a90dc3f0068
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 5416 bytes
font_01_sfnt_off0001104e.bin
aad9833f92bf121b7e8c74c6be87b74b6336c5c3f70e2a467321cd1dc488c865
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 11376 bytes