Malicious PDF — malware analysis report

Static analysis result for SHA-256 33622db4c1180af5…

MALICIOUS

PDF

92.1 KB Created: 2020-12-22 02:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4c01a79e9269d1f306655c470b4e5224 SHA-1: bdf6504d1ae1bb3a7891811b58cc126dd5bdced3 SHA-256: 33622db4c1180af57ffbdf6126df8cc7abe0eb4d683d104d9b23e66db2bb41bc
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to a game guide, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links is sufficient to classify this as a phishing attack.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=tree+of+savior+cleric+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5fde6c5d8cb19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5fa0a2ae987d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f90fc4d83b41.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/somaxef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5fc08a19ee2f4.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/muzilusiguwofixin.pdfIn PDF document text
    • https://lidonamu.weebly.com/uploads/1/3/4/7/134722791/6711349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5dd7fbda9c57a97e032dc/t/5fccd071d336b863f0c0a762/1607258226665/zombie_outbreak_i_drive_orlando.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/62878303583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca942c2-544c-46ee-9242-9bd963befd08/19127152150.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fc26dc75147b14804815df5/1606577608549/jonefeluxivuz.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_off00012a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A90 5196 bytes
SHA-256: 5dafe93ff3b7f44a7c2ab99b223c986fafc778df74685af2a4e8804a2d530b18
font_01_sfnt_off00013c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C53 11508 bytes
SHA-256: 34fa32c407f6e7a25203024eda08104225311d611616ec702a027eab7ba8c2ed

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