Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faad075b5d4b871…

MALICIOUS

PDF

69.9 KB Created: 2021-02-14 13:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd8bdd567cd23601e37c5479b4f17efe SHA-1: a7636ed28a7e7c2b6a2c7805a65b9435264f1974 SHA-256: 4faad075b5d4b871b6241f859984d1b91b9924dd526c39807015a879ba2f086d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/wix?keyword=march+of+the+penguins+worksheet PDF link annotation
    • http://nakrutkavk.site/fesupozivanifnk81.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/figadowux_fafowawan_madumemarerisi_nesugiwef.pdfIn PDF document text
    • http://tixshopclub.space/cisco_umbrella_platform_ordering_guide5mizr.pdfIn PDF document text
    • http://tameeniraq.com/35795664804yos9s.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/pexaxetamalixugis.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/73724b0bf.pdfIn PDF document text
    • https://raralafelu.weebly.com/uploads/1/3/4/4/134476833/rafifiwu-fuxiz-notuwagulosin-lubefuxasi.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/vizanavepewegad-dalaxosabutoru-retimovugemawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_601e4668b3527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fda928c9b61c.pdfIn PDF document text
    • https://susatabunek.weebly.com/uploads/1/3/2/6/132695662/1241647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465555/normal_5ff072dd64ec3.pdfIn PDF document text
    • http://itasda.online/zane_and_the_hurricane_chapter_13x6l3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_6010a9000eed4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fe4142ca2c08.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/namokapifalifizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367017/normal_5ff5bbe20e61b.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/b57b2e40d.pdfIn PDF document text
    • https://xudapunazegiwav.weebly.com/uploads/1/3/2/7/132741045/kimoji_lajatovetigoxa_sekopepomujaxon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 5408 bytes
SHA-256: 05e5c04295cc6db19c649fa564c896626a1723597e2774b1d4d72f862f47ba7c
font_01_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 10504 bytes
SHA-256: 226fb39135ac5ee23c180e6d02228f594e9b28e746beea1be13e5b84d96f9fbf

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