Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b43824d47da876…

MALICIOUS

PDF

66.1 KB Created: 2020-12-22 20:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d92e02dc78d9316cc7c1f5a9bcb7fae6 SHA-1: 79a75c18ea227dde98d78c9dc0342c05d633b5ce SHA-256: f6b43824d47da876d36bc652916eadd9d819a57287a33643cda14d5a15691455
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Mario kart 8 tournament 2020'. The presence of multiple embedded links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

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 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://traffmen.ru/strik?utm_term=mario+kart+8+tournament+2020 In PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/mowilo.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/11aa21bae43e6.pdfIn PDF document text
    • https://lebudikex.weebly.com/uploads/1/3/5/3/135310552/2df4792736370.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.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/eb5e8a93-99d3-4bed-b9ed-cf919d6072aa/vilafavotapajafivulunid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e718b77e-8a27-4d50-a848-03c9453d0f3a/imperium_universalis_rome_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f3e9fc-3ea0-46cd-ba0c-94c145745df0/modern_combat_6_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/9349751669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9ae989-c848-4fed-87cf-77c61b07d47c/67244323848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd9fab1-481a-4dc1-8101-de7c9f2690f9/goxufusaboreli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90b95b9-e19b-4f73-9d56-e025d30c04d0/lujubuxigezoxegazefifok.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_off0000c650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC650 5156 bytes
SHA-256: b0a3a3469775c2d50cc148d96751b0b2dde579696674555223409585ac401196
font_01_sfnt_off0000d7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D2 10552 bytes
SHA-256: 60af789ce674ffc8c0bc7ae343b72f4b3efb364ebc9d79d8785748b7c52d5a81

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