Malicious PDF — malware analysis report

Static analysis result for SHA-256 479227495c063cf6…

MALICIOUS

PDF

61.2 KB Created: 2021-02-05 05:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 318e97ad6c21abb1ad4c2ee17f8ee760 SHA-1: ef569d9a27a73401c96aefe24163f6c6111ef6f7 SHA-256: 479227495c063cf6a80a1d977ecb09810ce8878b60ce5664c897dd46d4b4c893
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially harmful content or facilitating further exploitation, rather than delivering a direct payload within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=wapking.+in+2019+album+song PDF link annotation
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/porawigakugupozutago.pdfIn PDF document text
    • http://frasqen.online/judememamujusut8fej8.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/5ebab709884.pdfIn PDF document text
    • https://gadujixefanupu.weebly.com/uploads/1/3/1/1/131163635/590e7ed.pdfIn PDF document text
    • http://ukranews.site/fobavigeruwim0cxe.pdfIn PDF document text
    • http://detonic-shop.website/cabela_dehydrator_instructionsex0jb.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/968b87.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/zesox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_601c78e512f36.pdfIn PDF document text
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/2b8e4a660b37.pdfIn PDF document text
    • http://reduslim-europa.site/radiofly_filme_de_comedieek1lh.pdfIn PDF document text
    • http://hot-money.fun/bizogafitefurogavurolef1htra.pdfIn PDF document text
    • http://wisecredit.info/tozevabebavifogopofurileg9rwxh.pdfIn PDF document text
    • http://yesstore.pro/armitron_watch_pro_sport_manualnbbay.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/nomujadevilip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380882/normal_5fe00d04145d3.pdfIn PDF document text
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/3393975.pdfIn PDF document text
    • http://sparzha.club/46950315761j4jjo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://situbepid.epizy.com/pyracantha_bonsai_care_guide.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_off0000b35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35E 5772 bytes
SHA-256: 108076bc89dfeb9c6d70fd673acacb0cadd31996e8944bb47539a6ea3d9fa829
font_01_sfnt_off0000c714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC714 9660 bytes
SHA-256: 5025cb8800abdce2eaac8d58a102eed5697f18fb8a90c28732b57e208220d524

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