Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0bd33562dde276…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 23:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a7f16a37ee86e78929c39bd4bde16d40 SHA-1: 91404a77a453d6dacda731478caf666ebcaaf45c SHA-256: 8c0bd33562dde276257526a1dfb13576f44ae9c53135201f3fffb45befff19bc
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it contains a callback phishing lure, prompting users to call a phone number. An external URI pointing to 'xezojetit.ru' was extracted, likely serving as a component of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/wix?keyword=4liker+apk+download+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493549/normal_603aef94b6611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_602803e25b645.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/xubelisajikup.pdfIn PDF document text
    • http://xrootunited.com/domiperexajakur9xrh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_6004d3c61335d.pdfIn PDF document text
    • https://gibodogud.weebly.com/uploads/1/3/5/9/135994226/310ed0ddc6de24.pdfIn PDF document text
    • http://chambrely.xyz/474230162235evh4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453332/normal_5fcd9ea8a3a98.pdfIn PDF document text
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/zejafumizoxewab-xiribuximalewa-xifimixumamewo-navutiluti.pdfIn PDF document text
    • http://world-wild-shop.com/happy_birthday_cake_design_wallpaperev87h.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/Fhb6pgz/wrebbit_3d_harry_potter_hogwarts_express_puzzle_instructions.pdfIn PDF document text
    • http://storeeuro.info/21850839205f0o93.pdfIn PDF document text
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/2580758.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/nufidibodudulad/51122990387.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/free_excel_home_finance_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/fawavikoleveleli.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/france_three_estates_voting.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_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 5444 bytes
SHA-256: 1cbfaa7c53265f9bd03d41ca54357da10578e0d97bd6cf4ae37dec961869441a
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 10980 bytes
SHA-256: 33d77617ed7389fbfbf3d85dc2f14eeee589f58ae86a4a854ce2e907e01e28c7

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