Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a5a767d5f4af1f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-22 23:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7fb624126dbd86686c4845d68a0bf13 SHA-1: 26ff6d90b73461780d7cdc4221c1ffc32acc8a45 SHA-256: 82a5a767d5f4af1f702d7a0dad7a68daf09cd666b96f1a7d30a4f2684a650c37
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, indicating a phishing attempt disguised as sheet music. It contains multiple embedded URLs, with the primary one being https://pelibifir.ru/123?utm_term=billie+eilish+lovely+sheet+music+pdf, likely serving as a lure to a malicious site or payload. No scripts were extracted, but the PDF structure and embedded URIs suggest a phishing or malware distribution vector.

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://pelibifir.ru/123?utm_term=billie+eilish+lovely+sheet+music+pdf
    • https://cdn.sqhk.co/dojarodawiw/hidje3p/29780499398.pdf
    • https://cdn-cms.f-static.net/uploads/4375341/normal_601a07233270f.pdf
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/bagolaralewolu-mesaxumufolupaj.pdf
    • https://cdn-cms.f-static.net/uploads/4456399/normal_6046e1dd57572.pdf
    • https://static.s123-cdn-static.com/uploads/4464878/normal_6008411c4ac39.pdf
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5fd27a3798d91.pdf
    • https://static.s123-cdn-static.com/uploads/4482027/normal_5fc9f9c066d08.pdf
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/f233961d.pdf
    • https://cdn.sqhk.co/redodadix/aLdjbij/bumblebee_camaro_transformer.pdf
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fd268143c13c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rojaxenutu.rf.gd/wetolupatefo.pdf
    • http://xegofavun.rf.gd/nlt_chronological_bible_reading_plan.pdf
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_91cf62ba944141b2b9b0fa0a7abe3503.pdf?index=true
    • http://jerekapubujiw.rf.gd/bioplastico_con_cascara_de_platano.pdf
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_969292dac9664c0f819fe9ef05db4c47.pdf?index=true
    • http://xexidevuwitaza.epizy.com/birthday_video_maker_apk.pdf
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_208ec5aa043d4f4d8fd6f0d44ba5fc41.pdf?index=true
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_da014cde581b4775b979943e7d3b6798.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_ef0f25a736ff41d4a296eb092796ab75.pdf?index=true
    • 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_off0000f935.bin
1bce3973702a420becc93f3e4a445265dbd3e7f1d773c03510a53227e8f2795b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 5300 bytes
font_01_sfnt_off00010b32.bin
4173f0193e37d47637eb3150b65212966b22499ef63a78d55091129655d80bd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 11088 bytes