Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbacfad838c0d1ff…

MALICIOUS

PDF

63.4 KB Created: 2020-03-29 21:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-07
MD5: 1f9f2c6b74f84a094eefff2dd1add8fd SHA-1: 5cc9390c803a460a5bcd42453a7367a9e282ceec SHA-256: dbacfad838c0d1ff5a14ddd57825482e8b623f391c291ee7fb6dd49f6159ca15
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a password-protected archive, a common method to bypass security filters. The presence of a password archive lure heuristic further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://neokundalini.org/uploads/1/3/0/9/130968976/130968976.html#comando+para+apagar+servidor+linux+red+hat PDF link annotation
    • http://myangelabartlett.com/uploads/1/3/0/8/130814290/pimokudod-perebovabijizex-xinimefuwerikid.pdfIn PDF document text
    • http://eurorumors.com/uploads/1/3/0/6/130620991/josak.pdfIn PDF document text
    • http://mail.mandalaband.net/uploads/1/3/0/8/130813320/b252c.pdfIn PDF document text
    • http://mta10.somekindofsimple.com/uploads/1/3/1/0/131071262/mofupisa.pdfIn PDF document text
    • http://pennywiseautoadvisors.org/uploads/1/3/0/9/130969838/9509953.pdfIn PDF document text
    • http://centre-climatechange-biodiversity-tl.org/uploads/1/3/0/4/130490786/a699e3.pdfIn PDF document text
    • http://thepackbrotherhood.com/uploads/1/3/0/6/130604215/7081b.pdfIn PDF document text
    • http://moxdemo5.com/uploads/1/3/0/7/130738555/jewigarut-rokaler-biruwiwin.pdfIn PDF document text
    • http://dncproductions.org/uploads/1/3/0/5/130539654/9354600.pdfIn PDF document text
    • http://arttherapycatemp.com/uploads/1/3/1/4/131406092/nitiketi.pdfIn PDF document text
    • http://cuttingedgesebringfl.com/uploads/1/3/0/6/130605516/sumewadumenol.pdfIn PDF document text
    • http://honesthomebuyer.com/uploads/1/3/0/7/130775053/nekuxofupabevi.pdfIn PDF document text
    • http://myriadconsol.com/uploads/1/3/0/4/130489343/c5d84c070ebd3e.pdfIn PDF document text
    • http://dreamdanceschool.net/uploads/1/3/0/5/130539933/xunomos-wizuwotefaf.pdfIn PDF document text
    • http://klgovaffairs.com/uploads/1/3/0/6/130639074/kusijavitox-wolevim-jawevax-penasurol.pdfIn PDF document text
    • http://neokundalini.org/uploads/1/3/0/5/130550836/5ceac85.pdfIn PDF document text
    • http://hempcultivationexperts.com/uploads/1/3/0/3/130323603/258130.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off0000bce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE3 11612 bytes
SHA-256: 0ff4ee81cd694a2e35d3eff81075fc76eb2781aeb836065a012e1f4925281f31
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 2600 bytes
SHA-256: 63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c

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