Malicious PDF — malware analysis report

Static analysis result for SHA-256 5093ae115d908070…

MALICIOUS

PDF

65.2 KB Created: 2020-11-22 01:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6e573f835739ca7848744de0a6a6da7 SHA-1: e27a0d723298ae9159940883096a552fa9d7766c SHA-256: 5093ae115d90807086d3f172efed97c77054c422210ac39a62b3d5665951881e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing. The embedded URLs and the heuristic findings point towards an attack pattern focused on redirecting users to malicious content.

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://trafffi.ru/aws?utm_term=format+sd+card+canon+600d PDF link annotation
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/dcd29be4506.pdfIn PDF document text
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/2833802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fa420ea9a086.pdfIn PDF document text
    • https://dudumudisedaj.weebly.com/uploads/1/3/4/5/134591614/lokijejoxuwetuvitun.pdfIn PDF document text
    • https://zifuxiwow.weebly.com/uploads/1/3/3/9/133997311/43d102acfa555c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8735b42041e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8ce07c27637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86ffda18907.pdfIn PDF document text
    • https://sesejeku.weebly.com/uploads/1/3/4/4/134495796/levitu.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/betilomunutojerof.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/7221309b-3da9-4623-8352-4163119106f4/exercices_corriges_d_atomistique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995e4cb2-6f57-4ff3-b456-0f879a9c6582/el_barco_season_1_episode_9_english.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_off0000c2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EA 5304 bytes
SHA-256: 348c1e1c995648df6c7888879be6cf37f9045c32bdef9721297439e966e76ad1
font_01_sfnt_off0000d4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D9 10488 bytes
SHA-256: d198e6f00259446631cda7a6149a77b6276aa73406952aae4b604036b226abac

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