Malicious PDF — malware analysis report

Static analysis result for SHA-256 98748d57212cd392…

MALICIOUS

PDF

69.6 KB Created: 2020-11-09 18:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bff54bb0e7869e3d255150ebb3d0e8f3 SHA-1: e6d1bb3116fca0d7ac251cd8e3e9e396ff2c958b SHA-256: 98748d57212cd392deb97e32121f430bdc0eaa377ef84571a43130a0d9413abf
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, including a known malicious redirector at 'traffine.ru'. The document body, though heavily obfuscated, suggests a lure related to 'clicker heroes save editor xbox'. The presence of multiple PDF links and the ML classifier output strongly indicate malicious intent, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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.
  • 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://traffine.ru/strik?keyword=clicker+heroes+save+editor+xbox In PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/0babbd86b6994.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/xirokapogorere.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/dasumave.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/rujabepifar/rinnai_rl75e_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/fate_grand_order_english_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/gradeup_banking_and_financial_awareness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495d4979-3250-4ea5-9e2f-4155c72a10a4/80792072826.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/good_morning_quotes_and_images_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01108c34-9ba5-44b0-9494-1ec90459f834/josovuludelezusaritomaros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827a2233-02b9-4c24-a4c0-459281266405/31791704680.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_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 5264 bytes
SHA-256: 3b5ddeb1f0cef6126bbe5f65742877c2c255b97891fb35cb73525d0eb2f1c2a5
font_01_sfnt_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 10972 bytes
SHA-256: 75e9c7db6cabaa0dece6f6fbe0975d93ca717fb8d6372ab549d676936842d1f1

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