Malicious PDF — malware analysis report

Static analysis result for SHA-256 273c0f1b1f3e5136…

MALICIOUS

PDF

54.5 KB Created: 2020-03-20 07:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 565e0b5fc4f2e4afeac195372c10bc33 SHA-1: 6c1d045679f939f40e39912915a4e315199345ea SHA-256: 273c0f1b1f3e5136c37764361111b6a9a67fb60bde2d0151ffd968efe09697ec
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a page with a Spanish title related to disease incubation periods, which is likely a lure. The document's structure and numerous outbound links suggest an attempt to manipulate search engine results or redirect users to potentially malicious content hosted across multiple domains. No scripts were extracted, limiting the analysis of direct payload delivery.

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://shopwithj2.com/uploads/1/3/0/6/130605278/130605278.html#a+que+etapa+de+la+historia+natural+de+la+enfermedad+corresponde+el+periodo+de+incubacion PDF link annotation
    • http://hotel-art.net/uploads/1/3/0/6/130620679/dalawebosofeved.pdfIn PDF document text
    • http://dreamdamselart.com/uploads/1/3/0/7/130739625/7334210.pdfIn PDF document text
    • http://www.theoildrop.org/uploads/1/3/0/5/130590416/giliwo-zebagilidiwume-velizewimo-bekilum.pdfIn PDF document text
    • http://nofrillsgallery.com/uploads/1/3/0/6/130621757/4367604.pdfIn PDF document text
    • http://cmfindlay.org/uploads/1/3/0/7/130775447/fusuxasud.pdfIn PDF document text
    • http://niceshotphotographer.com/uploads/1/3/0/5/130540406/sefomavusavudoraro.pdfIn PDF document text
    • http://webmail.musicboximprov.com/uploads/1/3/0/4/130493143/fewefolivesezem.pdfIn PDF document text
    • http://webdisk.flex-sander.com/uploads/1/3/0/8/130874156/bomegololufazodi.pdfIn PDF document text
    • http://batpensionersassociation.org/uploads/1/3/0/4/130483364/bexel_bititi_dukive.pdfIn PDF document text
    • http://martinscreeksolarfarm.com.au/uploads/1/3/0/5/130589275/a3725a.pdfIn PDF document text
    • http://targetlc.com/uploads/1/3/0/7/130776895/3789141.pdfIn PDF document text
    • http://sexpressyourself.com/uploads/1/3/0/6/130640090/zidinesaluvobebodizi.pdfIn PDF document text
    • http://www.blackskirtmediabuying.com/uploads/1/3/0/3/130312986/sagufamigix_tozoboropelerog_tobevobepowa.pdfIn PDF document text
    • http://canna-coast.com/uploads/1/3/0/7/130739836/fatamogus-dekuvupo-dasijopufadim-domejivojumenij.pdfIn PDF document text
    • http://metairielaw.com/uploads/1/3/0/8/130813132/a3520594.pdfIn PDF document text
    • http://fileserver.adamcares.com/uploads/1/3/0/2/130271035/7761391.pdfIn PDF document text
    • http://naumu.family/uploads/1/3/0/8/130874591/eb3de07ae68f.pdfIn PDF document text
    • http://theinternationalinsituteforreikistudies.com/uploads/1/3/0/7/130738704/181506.pdfIn PDF document text
    • http://yourcreativearmy.com/uploads/1/3/0/6/130605149/2543761.pdfIn PDF document text
    • http://www.the-investment-guru.com/uploads/1/3/1/0/131070330/1004508.pdfIn PDF document text
    • http://hostmaster.broughton-deli.co.uk/uploads/1/3/0/7/130775935/jitujapixij_sozoxo_lodofutevila.pdfIn PDF document text
    • http://www.allways.net.au/uploads/1/3/0/6/130603767/kububu_jufedoguse_lomijojew.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
🗂 Part of campaign: metairielaw.com 7 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8960 8964 bytes
SHA-256: 69fc6359d58c2755ae76c97f3ccc2ddf8cf3e69327f482df8ea52c1793533706
font_01_sfnt_off0000a9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FF 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000b366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB366 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63