Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d1ecbc3e130005…

MALICIOUS

PDF

115.8 KB Created: 2021-06-09 03:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8db88202e83c99273e85218572eb879d SHA-1: 164108fc432ef5b1f382534b62cbf8621d59a804 SHA-256: a8d1ecbc3e1300057bff794e7f4abbed19373c34f345213758c893bf259fd099
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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://oniceh.ru/pbw?utm_term=sri+vishnu+sahasranamam+meaning+in+telugu+pdf PDF link annotation
    • https://desalipi.weebly.com/uploads/1/3/2/6/132681317/vexelemedafegug-goginedin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_60496ff6b1e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_600fbb9ad76b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_602d567f88385.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/526831.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/firadelabiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_603d52dc0fe2c.pdfIn PDF document text
    • https://zikosale.weebly.com/uploads/1/3/4/0/134013107/banas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_601b6a65416ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5fd7f7eb62213.pdfIn PDF document text
    • https://lotuvimipel.weebly.com/uploads/1/3/0/7/130739731/goxisuvelev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_6029952915028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bipuwetek.pbworks.com/f/64356474333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7df852-178c-43df-8d99-e11805ae3c12/watch_insidious_3_online_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd68c8c-4ca5-42e6-ba12-de35b692890d/sun_joe_spx3000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479aa513-b952-495e-9403-7db293c8dafc/vatisetazobomezerukapop.pdfIn PDF document text
    • http://xanovobuxebo.pbworks.com/w/file/fetch/144792051/98896892980.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A7B 5616 bytes
SHA-256: 91180c5e217563c3235362637f533b034294b7a2316a351fe40e99ac4a765785
font_01_sfnt_off00019d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D72 10704 bytes
SHA-256: 13276a6b43e98c6cd67cd887976447d1ad466d1cdd8e03c9989fe0c7c3716db9

Open this report in the interactive analyzer, or submit your own file for analysis.