Malicious PDF — malware analysis report

Static analysis result for SHA-256 44521cc287d35514…

MALICIOUS

PDF

103.5 KB Created: 2022-04-06 04:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 312ecd337f3b28c08fc9de02604a4c6d SHA-1: 85105b82bd3736f9c62549c6ad284eef7ab61c2a SHA-256: 44521cc287d355144ade85845ac9110551edf4fabecc9a3f4b9322aac7eb5783
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs pointing to other PDFs, likely for SEO manipulation or to host phishing content. The primary URL identified is https://sunuf.co.za/YmrXLWy8?keyword=how%20to%20disassemble%20a%20treadmill%20for%20moving, which is part of a larger network of disposable hosting links.

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://sunuf.co.za/YmrXLWy8?keyword=how%20to%20disassemble%20a%20treadmill%20for%20moving PDF link annotation
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/vimoxoluwaba.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/9204316.pdfIn PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/jizulig_kufafazorejezos.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/bovazenubuxevo_pemadidib.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/murul.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/lemetiwo.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/bexafo-lomomoper-gedanikomerixu-bawefamesoxuju.pdfIn PDF document text
    • https://jonajudadereses.weebly.com/uploads/1/3/0/7/130775123/vovutumik.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/kokudamakurave.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/24200536611.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1624537681293c---zojuvifuma.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/52311444955.pdfIn PDF document text
    • https://daxugukixirujin.weebly.com/uploads/1/3/4/7/134739014/visabawif.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202204011348125589.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/66391654891.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/51875590471.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/1703856.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 10980 bytes
SHA-256: 8b0069aa6d650670a6211d65cb38b1c104a3115d161161c9d861014a11b70fc0
font_01_sfnt_off00014bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163E7 17232 bytes
SHA-256: b545ac1a94e45c11203e6196a8bf39f522370570e8e14afd743fe2edb97978e5