Malicious PDF — malware analysis report

Static analysis result for SHA-256 082e5a3c3be509d9…

MALICIOUS

PDF

67.8 KB Created: 2021-01-21 10:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9b5e001a5b294ffdf095b7670adfb622 SHA-1: 77057123b7880c3819601024f71464ff2b61f605 SHA-256: 082e5a3c3be509d980a7b20ce69ad5e725a7e3f90319014577b9126f21b3c82f
174 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in callback phishing or tech-support scams. While no scripts were directly extracted, the PDF structure and malicious URL suggest an attempt to exploit user trust for financial gain or credential theft.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=denham+springs+police+department+accident+reports In PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5fcef63d6546c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5fb6118aa45ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f95d4d82de16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375696/normal_5fcc3be98e0c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fa6c07e8f1ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5feea5d9362e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5f9d631d84fb6.pdfIn PDF document text
    • http://lupaper.22web.org/59653220784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5fca946bb7b30.pdfIn PDF document text
    • http://vepekideku.iblogger.org/free_employee_incident_report_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f95fc4435455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxanudof.epizy.com/votuwemife.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/expense_sheet_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/cardiac_tamponade_jvp_waveform.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/20239269890.pdfIn PDF document text
    • http://gozajogef.rf.gd/sam._cengage_answers_2019.pdfIn PDF document text
    • http://lenixad.epizy.com/sqlite_android_studio_create_database.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/54128336373.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/14125716879.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_off0000cc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC24 5488 bytes
SHA-256: 5eb7b6aa15d535815649f3899b5849e8e21042e096d263618d143fa171499260
font_01_sfnt_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 10472 bytes
SHA-256: d9383be46401d05a6a05507ccb72be19e5baa75549b01a0b50d5416e1077b727

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