Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da630415ea74d48…

MALICIOUS

PDF

70.7 KB Created: 2020-11-16 20:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 03c7651fb715162d2f3c85c4e01f7768 SHA-1: 6835da1429816d39cb9554d3386a185d1213705a SHA-256: 7da630415ea74d486926add9236de28f9245c2af4514e4e2ab701ae9cdfdcf66
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at 'https://cctraff.ru/123?utm_term=classic+retro+games+unblocked'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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.
  • 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://cctraff.ru/123?utm_term=classic+retro+games+unblocked In PDF document text
    • https://kiwusaxanasatip.weebly.com/uploads/1/3/0/7/130738973/nekebatedovuwaj-zaxedotoro-vitafulejofud-patufizevir.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/maxipilo.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/7049f4.pdfIn PDF document text
    • https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/4567349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f9438f1d27db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5fad860119b53.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/1ec1690b46f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488604/normal_5fb2a3ad439a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f8fa27489227.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/zobagirapebukikubivataxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/36496593777.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/ios_mortal_kombat_x_hack_ifunbox.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/autocad_notes_in_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC837 5368 bytes
SHA-256: cebbb08cb15de49cd1cf2662e9365c4bfefe02d723f8afbd02c89fb8cea7da48
font_01_sfnt_off0000da5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 10972 bytes
SHA-256: 67a865d2a9638a78f7fa4d5cc464fb472bd99de48241a839abcb24b0ec2350fc
font_02_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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