Malicious PDF — malware analysis report

Static analysis result for SHA-256 582276e4ecc514e3…

MALICIOUS

PDF

76.9 KB Created: 2021-04-07 14:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1e30c7bb9c13ce0aaf92fdcce4b677 SHA-1: 704d5ab03ab449202a99d9c9d1af7dc0fde465ad SHA-256: 582276e4ecc514e3c47bcd8a98bd56d3caf2ce8735f8c257462c23334e016e60
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a link farm. It contains numerous external links, including one to 'dafemum.ru', suggesting an attempt to redirect users to potentially harmful content or phishing sites. The document body, though heavily obfuscated, appears to be a lure related to HP Chromebook chargers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7915

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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=do+all+hp+chromebooks+use+the+same+charger
    • https://vebupefipi.weebly.com/uploads/1/3/4/4/134497137/1720775.pdf
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/8030769.pdf
    • https://zojujevekuki.weebly.com/uploads/1/3/0/9/130969212/bavunupojab.pdf
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/0c2f930.pdf
    • http://wumofuzusagumo.22web.org/pdf_quran_taj_company.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_7cea71c437bd4b3894f4499fc61625d2.pdf?index=true
    • http://kesaratesur.epizy.com/srujana_audio_call_recording.pdf
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_3997de4860bb4ef7890d7c941fc8bc1b.pdf?index=true
    • https://s3.amazonaws.com/sefepugolupalax/gotob.pdf
    • https://s3.amazonaws.com/panalipolifod/kyocera_fs-1135mfp_toner.pdf
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_697b051b322f47d39656b23358e5ebfe.pdf?index=true
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_2f5828977a11405b95ddfd9ca4311fca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/85e9699b-6df8-4fe3-a585-eedd8ae5c039/19146176809.pdf
    • http://dofenepebasep.epizy.com/gadolaxajabaves.pdf
    • https://uploads.strikinglycdn.com/files/2c6bf18f-0b52-48fd-a08e-827ed0f23134/gudipinusanepasodopil.pdf
    • http://dilalixurapa.epizy.com/free_shutter_count_canon.pdf
    • https://s3.amazonaws.com/jafujasiwetid/patusukemumijiruf.pdf
    • http://bumitorazefi.epizy.com/47119698528.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_81f9456d7f2b48db8cfe1f64770e037d.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e8.bin
529b473a63134752779afbb7a9c7f8cb6da1110f66a592176d29f737abbdd137
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 5548 bytes
font_01_sfnt_off0001099c.bin
4c4bbf905667abbbb656a374311c79d3e0745ad6b1631471e3b03bafd902a9b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099C 11224 bytes