Malicious PDF — malware analysis report

Static analysis result for SHA-256 f987f06435b2e7c8…

MALICIOUS

PDF

35.2 KB Created: 2020-05-15 04:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90e49fce1f423349ff9995544be7f585 SHA-1: f23078a0783541b3d9211705dd7f3c63d4d3bc4d SHA-256: f987f06435b2e7c864e91f557633eb73c0e736089be752cc03f58a1b16039cb0
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains designed for SEO link farming. The primary heuristic indicates a critical finding of a 'PDF_SEO_LINK_FARM' with 24 generated SEO PDF links, dominated by the host 'welloff.marketing'. The document body, though heavily obfuscated, contains URLs that are part of this link farm. This suggests the PDF is designed to drive traffic to these sites, likely as a prelude to further malicious activity or to generate ad revenue through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://aplushydrojetting.com/uploads/1/3/1/4/131409090/131409090.html#autocad+plumbing+drawings+pdf PDF link annotation
    • http://welloff.marketing/uploads/1/3/0/9/130969279/xabujuketibikis.pdfIn PDF document text
    • http://gspromocoeseventos.com/uploads/1/3/1/3/131381904/wukuzis-miwali-wisifibajufe.pdfIn PDF document text
    • http://palmsopenproject.com/uploads/1/3/0/5/130589391/fumitovukosa.pdfIn PDF document text
    • http://globalstrangers.com/uploads/1/3/0/8/130814931/tilogateg.pdfIn PDF document text
    • http://williambing.net/uploads/1/3/0/9/130969921/cc690dec961b02e.pdfIn PDF document text
    • http://stemedacademy.com/uploads/1/3/1/6/131637150/maxiwapuzun_wemuta_nopetetome_tifuveteluba.pdfIn PDF document text
    • http://jennifercoffman.com/uploads/1/3/0/2/130272644/8723902.pdfIn PDF document text
    • http://woodiesbodyshop.com/uploads/1/3/1/4/131438747/65e94.pdfIn PDF document text
    • http://goodgerpinkproductions.com/uploads/1/3/0/8/130874683/f157104cb.pdfIn PDF document text
    • http://caddiesoncourse.com/uploads/1/3/0/6/130604956/8491225.pdfIn PDF document text
    • http://sacramentoyardcare.com/uploads/1/3/0/7/130775432/3a4c53aa9f03bb9.pdfIn PDF document text
    • http://whitehawkgallery.org/uploads/1/3/0/6/130603704/9204117.pdfIn PDF document text
    • http://soulredemption808.com/uploads/1/3/0/2/130288673/916da0b7856cd.pdfIn PDF document text
    • http://platformgym.net/uploads/1/3/0/6/130639334/3173616.pdfIn PDF document text
    • http://essienenergy.com/uploads/1/3/0/5/130589145/5f30943.pdfIn PDF document text
    • http://androidmarketgiftcard.com/uploads/1/3/1/6/131636753/9b4685f.pdfIn PDF document text
    • http://higginsrestoration.com/uploads/1/3/0/4/130483748/renetazepik.pdfIn PDF document text
    • http://vividattention2detail.com/uploads/1/3/1/6/131606094/656f13cb07de45.pdfIn PDF document text
    • http://eehenry.com/uploads/1/3/0/6/130639313/balax_nakuroxa_duvavu.pdfIn PDF document text
    • http://bestfitnesstrackerreviews.com/uploads/1/3/0/8/130873949/451016.pdfIn PDF document text
    • http://heartlandgeriatrics.com/uploads/1/3/1/6/131607363/7c53357.pdfIn PDF document text
    • http://deepdive5rhythms.com/uploads/1/3/0/5/130588858/fovevazidatar.pdfIn PDF document text
    • http://foundermaterial.com/uploads/1/3/1/4/131438747/9088563.pdfIn PDF document text
    • http://moldremovalspokane.com/uploads/1/3/0/8/130874533/kiberolifumeron_mexefovezenosan_kepizufus_pukajen.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 10044 bytes
SHA-256: ff6ab2f2576caa4f3fdddcb1dc5f2c0f330c59a63c5be3adc20969e7454e8dab

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