Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2914b8f91293c52…

MALICIOUS

PDF

85.8 KB Created: 2021-03-01 17:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: be78bb9d47ff61edba53f517f6ee714e SHA-1: ac03b74aeaf5a6e1e3106362fbe80b84a9a8f07b SHA-256: f2914b8f91293c525dc28c72304ef01aad7064384286eb068c1e627cfccaf335
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating it functions as a link farm. The primary purpose appears to be directing users to various external websites, potentially for SEO manipulation or to host further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/wix?keyword=moonology+diary+2019+pdf PDF link annotation
    • https://rosexanovetaw.weebly.com/uploads/1/3/0/8/130814227/tukarul-birirafi.pdfIn PDF document text
    • http://damvglaz6.xyz/nasuratonuruzovivn0g91.pdfIn PDF document text
    • https://pepexelizuruxu.weebly.com/uploads/1/3/4/6/134656498/f4248bc4598.pdfIn PDF document text
    • https://litirovedogamat.weebly.com/uploads/1/3/5/3/135393382/6413472.pdfIn PDF document text
    • http://prodson.space/8005278974981xn.pdfIn PDF document text
    • https://kokuxokuge.weebly.com/uploads/1/3/4/7/134771281/xelofexonudog_seworujojewatez_jinenuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fdeae6850735.pdfIn PDF document text
    • https://jeboxuxu.weebly.com/uploads/1/3/2/7/132710743/351223.pdfIn PDF document text
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/nuwudil-bawevemevuxum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5fc6285519db6.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/rituvalamotopa.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/7600931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff6b2442b3c7.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/vuxirefare/babymetal_metal_galaxy_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/consulting_services_agreement_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/dulem.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/fovibarezapene.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_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 5620 bytes
SHA-256: 86c506ee14886b6b7adb91af95776be9b788e651405a159f325dddc1d7a31b45
font_01_sfnt_off00012676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12676 10440 bytes
SHA-256: 38fca6d37a4c1845251b2ea94e3e5f5c360881636a5b0ef8bc0d415c5d17b251

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