Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4345aa934fb48b…

MALICIOUS

PDF

129.5 KB Created: 2021-03-20 15:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 05d5d8312d7e1ba1882416e48c334061 SHA-1: 9f11667a70c06ba4a4559258d308ebe3d4c8dae8 SHA-256: 4f4345aa934fb48b4d7fe9149474ae40976f782932f5db9a8799b7c3f206745d
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=north+conway+nh+police+reports PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fe15a9ad3113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5fe972a89f58f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479679/normal_5ff597af94534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_604fbddc12f17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5fefc1cb9f84d.pdfIn PDF document text
    • http://vukabakoxipus.22web.org/texoxeserefuradabifome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_6040a6ac5d10b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_6027f0a2a24ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_5fdf381063eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_6008f7b1b969a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_60207de9ca595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavabime.rf.gd/36168779227.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/mibitij.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/blitzscaling_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/how_to_install_canon_printer_without_cd_on_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/radiological_physics_book.pdfIn PDF document text
    • http://pikezega.epizy.com/40219675453.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/36331135570.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_off0001c3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3C9 5184 bytes
SHA-256: 5c506ad2f3283e9c8500036118e4ec72bd6110c732a182212ec2eb535b8417e9
font_01_sfnt_off0001d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D586 10196 bytes
SHA-256: 13273c03bed5b5eeaf616ca81c97b0853386dec1ce7e0785cce7c0c784b64751

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