Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab2350b35bc8cc5…

MALICIOUS

PDF

87.3 KB Created: 2021-03-28 19:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f3bd1eedc6a7e9a08bafe15f2214cdb SHA-1: 363720fe60042355b5967f07daafb27ae58cb38b SHA-256: 0ab2350b35bc8cc54d396f0e9f610f67e64fe7562180487aef77d000f5c23176
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://golowaki.ru/award?keyword=sociologia+da+educa%25C3%25A7%25C3%25A3o+sonia+kruppa+pdf PDF link annotation
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/911dcf917d.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/daPqhdq/fijuxuxa.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/lejowulilonare-pituduzi-newixedufubin-zorunuw.pdfIn PDF document text
    • http://gumovuf.22web.org/pdf_magazine_reader_windows.pdfIn PDF document text
    • http://jesawukimefix.mypressonline.com/nojukew.pdfIn PDF document text
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/6168042.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/j4jd35t/vuwem.pdfIn PDF document text
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/bofimo_newozokijod_sexiranilevozub.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/4523899.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/bgigjiS/diamond_minecraft_seed_xbox.pdfIn PDF document text
    • https://tozafutesaf.weebly.com/uploads/1/3/4/9/134900259/6967460.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/59654702736.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nobidaponofuxul.epizy.com/91034881902.pdfIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/wild_animals_colouring_book.pdfIn PDF document text
    • http://wiwisogovas.rf.gd/relation_between_electric_field_and_magnetic_field_in_free_space.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7247e594-e2aa-40f4-a4f0-670221859a2e/vuzurupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3212a7-cc67-4ebc-8e63-2014d7f2f5a1/lean_business_canvas_template.pdfIn PDF document text
    • http://gamadajizi.rf.gd/88794093545.pdfIn PDF document text
    • http://bimibukiju.rf.gd/zerorisotoxiben.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_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 5992 bytes
SHA-256: 8084a9927190bfecd684550b02737202307c7e1c1bd838cd1c8ec69086d26d13
font_01_sfnt_off000127a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A8 12576 bytes
SHA-256: 93a601fed6468be1f7b66ce29ae94308393f9fb5ee303135a79b7fe7ea67410c

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