Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b4088622b3cbad…

MALICIOUS

PDF

61.2 KB Created: 2020-03-23 17:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: ab9ec0a2a80a9ae87f12989835b8a40d SHA-1: b332d047d80d45d5f96bdc830875c0a251f4a382 SHA-256: b4b4088622b3cbad1be9358a11515681dff7397f3eafd489bd5e5dc5f585443c
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these links, including 'http://atasteofjamaicaandmore.com/uploads/1/3/0/5/130588787/130588787.html#libro+de+enoc+hablado' and 'http://dzwigal-instal.pl/uploads/1/3/0/6/130620848/sexupip.pdf'. This structure suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

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://atasteofjamaicaandmore.com/uploads/1/3/0/5/130588787/130588787.html#libro+de+enoc+hablado PDF link annotation
    • http://dzwigal-instal.pl/uploads/1/3/0/6/130620848/sexupip.pdfIn PDF document text
    • http://simplyexquisitehg.com/uploads/1/3/0/7/130740323/2162769.pdfIn PDF document text
    • http://eliteopm.com/uploads/1/3/0/7/130775974/xonelukulaxuvopovumu.pdfIn PDF document text
    • http://drivingcommunication.com/uploads/1/3/0/3/130379590/garopufeminetixivu.pdfIn PDF document text
    • http://chemaroma.org/uploads/1/3/0/8/130873828/9124e.pdfIn PDF document text
    • http://mta-sts.mail.mentawaidaze.com/uploads/1/3/0/6/130640025/wixuvopuminaru-tolazegagev-bemududeregel-tolijizopepa.pdfIn PDF document text
    • http://ntoumei.com/uploads/1/3/0/6/130620820/kizazumo.pdfIn PDF document text
    • http://www.helsinkieducationfilmfestivalinternational.com/uploads/1/3/0/6/130621179/5360230.pdfIn PDF document text
    • http://benclaremont.com/uploads/1/3/0/5/130589222/kifomew_dizuma.pdfIn PDF document text
    • http://konak9.com/uploads/1/3/0/5/130590200/8961517.pdfIn PDF document text
    • http://garynelsonsales.com/uploads/1/3/0/5/130540397/givupufuxes.pdfIn PDF document text
    • http://www.littlerevelend.com/uploads/1/3/0/9/130968995/bewore.pdfIn PDF document text
    • http://inmobiliariaarenas.net/uploads/1/3/0/7/130776572/fuxivurago_wamekizutifuge_votiji.pdfIn PDF document text
    • http://danielmachine.store/uploads/1/3/0/5/130541272/volemidugaju.pdfIn PDF document text
    • http://midnightjusticefilms.info/uploads/1/3/0/7/130775171/nugulipefuzedoz.pdfIn PDF document text
    • http://brianhaggard.com/uploads/1/3/0/3/130313585/duwalulevu_garivevutafafap_folamelekefi.pdfIn PDF document text
    • http://nihaoskiescalls.com/uploads/1/3/0/3/130313484/8f2fd8b227ca8.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
    • 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_off0000a3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FC 10460 bytes
SHA-256: ecbfd91ec0ff272a02aa4fa8cebdbedea03083946c52a371e311e3e8d6fc9f4a
font_01_sfnt_off0000c8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A6 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000d20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20D 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63