Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfe1a89997afdcf…

MALICIOUS

PDF

74.7 KB Created: 2021-02-05 16:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f8c1567951686baf857f3fdafb198ff0 SHA-1: 44e6fa09c5366fef8358f47e1951ff989cc4355b SHA-256: 7bfe1a89997afdcffd2d2ceb0e86098be2ab26d36de5b8b7cdad06d032d67ec0
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing attempt, likely to trick the user into calling a fraudulent number. While no scripts were extracted, the presence of external URIs suggests the document may attempt to redirect the user to a malicious site or download further payloads.

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://druttle.ru/123?utm_term=idle+supermarket+tycoon+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd111eab982c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456140/normal_5fcfa3d196531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_6011a94953e50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_60138b776ec37.pdfIn PDF document text
    • http://yewes.fun/xetikejidoseroferovu6tkxv.pdfIn PDF document text
    • http://cardioactiveuficiale.site/oxford_dictionary_english_to_tamil_free_download2go4y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_601b42f022ff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fff1368cc9cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_600b68971ce69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390055/normal_6007c435227ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_6002d47f9ea55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_60188225e5010.pdfIn PDF document text
    • http://hot-money.fun/formuler_z7_remote_control_manual4cftw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fe1f75e290cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_601195ba4e951.pdfIn PDF document text
    • http://fridgeservice.ru/biceps_clicker_ofglapkn.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/ribowexulo/keneluwovizejakabumapux.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/1938229501.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/chess_application_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/hazard_incident_and_injury_reporting_procedures.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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 5416 bytes
SHA-256: 7c0986d56a9ae1682222c1026ab6bcd252e6ee97207010878b40305b1d0c0ec0
font_01_sfnt_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 13244 bytes
SHA-256: ee7ce3bac90af075010da4eeec82be9e79caedfa73119207ac659c97caaf5b9f

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