Malicious PDF — malware analysis report

Static analysis result for SHA-256 29674471add27d06…

MALICIOUS

PDF

84.5 KB Created: 2021-03-31 12:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 96858c5514f9ba139aafaef0450765a7 SHA-1: be4d05ba3f58c1311467e07cecdd7e05d19cbba3 SHA-256: 29674471add27d060a033733711e6926145ed5e6363da2328c21ca522eba2d39
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a characteristic of link farms used for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://gimoguvi.ru/award?keyword=sodium+lauryl+sulphate+msds+pdf PDF link annotation
    • http://guzexesuge.mypressonline.com/xalevaxukugibiriseg.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/31499061605.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/33315581525.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/wamuvofopitewi.pdfIn PDF document text
    • http://mejumafegebameg.mygamesonline.org/81666348313.pdfIn PDF document text
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/1099399.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/46711329414.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/71703066980.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/vunute.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/basic_electronics_communication_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fazobelo.onlinewebshop.net/how_to_become_a_registered_veterinary_technician.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49709c60-6f90-4f58-985d-e8f7797517b0/how_to_read_gdp_deflator.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/88575060094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371573ea-aa2a-448c-9e29-9c096fbf0d10/how_to_cancel_a_gym_membership_during_covid.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/skyrim_se_best_wabbajack_mod_list.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/what_do_you_need_to_bring_for_vehicle_inspection.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/comprehension_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/ledefijisidapepamotuli.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 5264 bytes
SHA-256: 83cecde3873fe8f7efed27c9ac2e80e1905a79cac58338e0bc8f889b958afad2
font_01_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 10896 bytes
SHA-256: 382a71c133cd37101cf38446374d380e3d85acbb79badd9df985b4b12471c99e
font_02_sfnt_off00012085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12085 16364 bytes
SHA-256: 43dc044dd8481c509f32df3b332f5d426605aacd16ec6ef701c0585e439a54e7
font_03_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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