Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae75daee080a9c39…

MALICIOUS

PDF

113.5 KB Created: 2021-03-29 21:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0324731df8b6aaea3e6b5a455baa48b3 SHA-1: 8dc4193ff01b815ec8fe0d9803d0827bbbbb0e67 SHA-256: ae75daee080a9c3978b169b35fde6bc1401a4f9e25064c7c737056a5efe5651f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://druttle.ru/award?keyword=cleaning+company+profile+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/zipirevofu/Se0ggib/tanogidamelikajosuralenus.pdfIn PDF document text
    • https://gikexirubunos.weebly.com/uploads/1/3/4/6/134644737/zosur.pdfIn PDF document text
    • http://5gusevshop.space/jilafejizofuneb80qn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_606066ae6cb00.pdfIn PDF document text
    • http://cocobuka3.xyz/galuzejovinufoxanokopibuqluf.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/wijamomewi-doxoxenanuk-senofiguvoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fcbb8a964d29.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/ZKtgcYz/gaguwerobukedovorawid.pdfIn PDF document text
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/dibonegewesima.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/jejbjhP/oxygen_tank_refill_price.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/fobipinuvovox-wawivuzusopu.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/0iehnhj/levaxemoxomunaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489415/normal_5fee4ee8970d3.pdfIn PDF document text
    • http://itawegan.space/96769065645ywqck.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/8846c2ae-fc1d-4531-b101-047b1d97906f/64257089075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abc01da-141d-461d-88eb-9168b6211cc6/gosan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7eb8f0-ea77-43af-b275-42133a0fc29c/zumarewivavawu.pdfIn PDF document text
    • http://nelifudo.epizy.com/instrumentos_de_recoleccin_de_datos_en_estadstica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa5470f-53be-47bd-b0ed-ec15b95c266e/blue_dapple_miniature_dachshund_puppies_for_sale.pdfIn PDF document text
    • http://mabiwariw.epizy.com/introduction_to_computer_science_and_programming_in_python_problem_set_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50eb1766-e3b4-4039-b3a8-5914864d6f06/naduw.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_off00017b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B7B 5484 bytes
SHA-256: ffcfd24caf03b1f150bc493c355f4e2504e53520a949e2dbfe5694db2730d510
font_01_sfnt_off00018e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E13 12584 bytes
SHA-256: f0575a03c003df829bcd94e2e6bdd97fb4f112e73060d9ae96ceacb4ba74cf01

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