Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fb48b8641f5ba7…

MALICIOUS

PDF

44.7 KB Created: 2020-10-02 18:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 90a486bd6e6b8a1843c9ab67b071957c SHA-1: 7b53d58c8bf05c7ec9a003e25eda8bef43d25713 SHA-256: 33fb48b8641f5ba73930cd3eefec9c51c2039fa8d4d7ba0b236f6e828cd5f5ac
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.link/pify?keyword=ib+history+hl+paper+3+past+papers+americas In PDF document text
    • http://xexofopa.humblemonkbrewing.com/uploads/1/3/0/7/130740151/koxiwugegun.pdfIn PDF document text
    • http://kiwixep.mesmanfarm.com/uploads/1/3/1/4/131438448/6036353.pdfIn PDF document text
    • http://lezewa.mjkyarchitects.com/uploads/1/3/2/6/132695569/jigiw.pdfIn PDF document text
    • http://files.tntcenter.com/uploads/1/3/1/4/131407704/dobusoxoranevorevono.pdfIn PDF document text
    • http://files.keyahealth.com/uploads/1/3/1/3/131379671/2011917.pdfIn PDF document text
    • http://tadinadox.innovate2educate.co/uploads/1/3/1/8/131856516/dufomedakuj-wasosibex-tawiwero-misotibemewatap.pdfIn PDF document text
    • http://bebisoj.scw8whedonstudiestv.com/uploads/1/3/1/8/131856435/wuzukemedep.pdfIn PDF document text
    • http://sozaxaj.insyncmt.com/uploads/1/3/0/8/130814085/4122932.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/524b00fd-4b76-427b-9294-687d5e2dc719/wupiwej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffca174c-a5f0-4e12-9e14-81979c90c117/livojigaxitinitezimimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18608aa-d7e3-484b-bb29-a2dd0a5b82c3/33699666072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ef11c5-d702-4d84-a1cd-ec6145c70879/tesevevorizoluroralo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fefe6ec-80e2-4f9e-82ec-45fc4cbe61c8/lufifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61a57e1-491d-4f40-b188-1c263c851a77/53309266431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bf5364-f6ef-439e-9be4-9e79850a0648/4240659802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec2b564-5599-440c-a5ca-682e8417b400/votagegemure.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_off00006ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECE 5516 bytes
SHA-256: 641bc79f65644b868948f152f89149829f703fffc35efe5168edc2d190f80f82
font_01_sfnt_off00008163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 10732 bytes
SHA-256: 652403f4c12af788e9e6a95d79db5f80c54859809755b0dde54edec3f8af1691

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