Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7031feb6ea6ab08…

MALICIOUS

PDF

70.7 KB Created: 2020-04-14 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 666aa21c1d0e45e108c23136ddc30d72 SHA-1: a9f72630a432f47250cfe7c89dd2d4da59dcd9d7 SHA-256: d7031feb6ea6ab08e6bc0e0aaaede38a6c1bdb06443895af7f793c8c87630715
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attack. The document body is heavily obfuscated and contains embedded URLs, but the primary malicious activity appears to be the distribution of these external links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://uibffworld.org/uploads/1/3/0/6/130604452/130604452.html#cardiac+arrhythmias+pdf PDF link annotation
    • http://pegschweitzer.com/uploads/1/3/0/6/130620501/bomaf-vixisovetazade.pdfIn PDF document text
    • http://meticules.com/uploads/1/3/1/4/131409009/piramubitamolaw.pdfIn PDF document text
    • http://forb-courses.org/uploads/1/3/1/4/131409884/gagemabe-vegowe-digivej.pdfIn PDF document text
    • http://oneloveteenproject.com/uploads/1/3/0/7/130776088/vanenu_zuvomawik.pdfIn PDF document text
    • http://lovetolearnfl.com/uploads/1/3/0/7/130775396/fd730ffe305.pdfIn PDF document text
    • http://leiyamahoneymassageandbodywork.com/uploads/1/3/1/0/131070827/purowomosusila-fukev.pdfIn PDF document text
    • http://mathoutreach.com/uploads/1/3/0/2/130272976/pikuwebujazole.pdfIn PDF document text
    • http://dadtheatre.com/uploads/1/3/0/6/130621669/7ed98293a11.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 1544 bytes
SHA-256: b095009e1aa7b679086a2dd093949a1e2bfdfa179c83d9e64a20210f199a406d
font_01_sfnt_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 8672 bytes
SHA-256: 4412986b8bfb8ee0bbd0ef71fdcb877e13f149ca3186407ea2eed36d3919fd92
font_02_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16084 bytes
SHA-256: 6fd14b75b40592aa63214dc3858e40b996a0bcf5155abc0d72d014faea57e82d

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