Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e629b7963fa02e…

MALICIOUS

PDF

58.0 KB Created: 2020-03-20 07:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-07
MD5: 0c0d07dd3722cc4c5807a1c75c34d2a1 SHA-1: e00373ae2a88e4bc364fd3c8be504801aa5402b2 SHA-256: 84e629b7963fa02e057de9decef0516f87cbabe88e4236d97d701b54648b48a6
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files on unrelated domains. This behavior is indicative of a link farm or a redirection scheme designed to obscure the ultimate destination or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://1842barranca.com/uploads/1/3/0/6/130621413/130621413.html#historia+y+estructura+del+adn+y+arn+transcripcion PDF link annotation
    • http://strangebrau.com/uploads/1/3/0/6/130605393/jojim.pdfIn PDF document text
    • http://artofcannabiz.com/uploads/1/3/0/2/130289279/jagafepogibem_bokev_lirer_lajavowef.pdfIn PDF document text
    • http://narayanahotelandresidences.com/uploads/1/3/0/6/130622076/zinikenoxifizoperu.pdfIn PDF document text
    • http://www.wecaremi.com/uploads/1/3/0/6/130605314/bejugijozije-bajow-zovijinizel.pdfIn PDF document text
    • http://empresamorenodrywallsteelframing.net/uploads/1/3/0/3/130312929/xexetopafugizezi.pdfIn PDF document text
    • http://trainingcenterchurches.com/uploads/1/3/0/5/130550713/3443254.pdfIn PDF document text
    • http://www.whippoorwillfarmcsa.com/uploads/1/3/0/4/130476859/kinewozojeges-netumesa.pdfIn PDF document text
    • http://www.mosquitomiracle.com/uploads/1/3/0/7/130775572/piveji.pdfIn PDF document text
    • http://mail.projecthealthycommunity.org/uploads/1/3/0/8/130874384/952b40093d.pdfIn PDF document text
    • http://scireinke.com/uploads/1/3/0/5/130546237/topewavezux.pdfIn PDF document text
    • http://www.gwhsgbesi.com/uploads/1/3/0/6/130620719/5406272.pdfIn PDF document text
    • http://nowbiz.net/uploads/1/3/0/6/130621857/9727266.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

Related samples 1

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_off0000b964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB964 9392 bytes
SHA-256: 288526baeaca13e6a10c824ba8065f62555da2032066fdcd384fb4fc124c28f2

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