Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62a33f7ca003946…

MALICIOUS

PDF

68.0 KB Created: 2020-12-22 15:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9823fae8684e603d9877333aba920491 SHA-1: 5a7295decead62c585d64fe087051ebca5eb48fc SHA-256: f62a33f7ca003946cf450c8c7194406e9c79c574bbaccdb96e9a70e5fbff4164
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm hosted on disposable infrastructure. The document body, though heavily obfuscated, contains text related to downloading hacking tools, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/aws?utm_term=descargar+clash+royale+hack+tool+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_5fb723d545502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f925461cd031.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/6d371b4a243e2c5.pdfIn PDF document text
    • https://punelita.weebly.com/uploads/1/3/4/6/134679726/5288035.pdfIn PDF document text
    • https://dikuzimomufadel.weebly.com/uploads/1/3/1/3/131383892/e86ae44f425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fceb02310cbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/622858a7-f056-444e-b45e-fe46012de4e6/69325878280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629a4468-f5a9-4875-b86a-17bca7aef47d/zujukejotavogegemanazemag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09073bbd-72c5-481f-809a-e3d2d3955dc4/presentation_secrets_of_steve_jobs_audiobook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35efaaffbf90a66fa355a/t/5fcebda56d8d5c7d479b1981/1607384485717/olympics_2016_gymnastics_medals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86317b0-9da9-43d2-bbbb-12ff7a955538/75898399805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c4304f-3eb8-4005-8874-2e82a2b12866/55218157689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78e1bfa-0c5e-4a9c-9cde-a984bcd54ddc/zazus.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_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 5368 bytes
SHA-256: 832b080b35bd9deb6997291748f4e5e124a4118bc974c86c26fbb40b6ad66bd7
font_01_sfnt_off0000de75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE75 10840 bytes
SHA-256: 2cb31e041220333fc58409a9dfdc8cdaec5b33f0119ec31fdf8745488c065c73

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