Malicious PDF — malware analysis report

Static analysis result for SHA-256 da011a443addcbb6…

MALICIOUS

PDF

96.7 KB Created: 2021-03-27 10:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39484c76db4a19a3a1a809c7e7dc286e SHA-1: 97c8829045ae9bede0dad3ad88816891ae9c1016 SHA-256: da011a443addcbb6dec8e7d1e178dea6c8a645251275ee65f3da461c18c1438f
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to redirect users to malicious sites or download further payloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://golowaki.ru/wix?keyword=ikaw+lang+ang+iibigin+may+15th PDF link annotation
    • https://cdn.sqhk.co/vunalogivefu/iIxgiii/stickman_hook_descargar_para_pc.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/74441322003.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/U4jiqQ0/onnect_pair_matching_puzzle_printable.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/difference_between_exothermic_and_endothermic_reactions.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/encyclopaedia_eorzea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_605bff4ae42c7.pdfIn PDF document text
    • https://cdn.sqhk.co/kupibetefuko/XFjCU2d/street_dunk_contest.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/JjiGQuU/chuchel_download_mac.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/zakarova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_605a61de5c511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_5ffe4cba5f0b8.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/ePjfgdR/44806275070.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/kKiggcd/clash_of_clans_war_base_layout_th9.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/ejercicios_de_analogias_para_cuarto_de_primaria.pdfIn PDF document text
    • https://cdn.sqhk.co/diwidivu/gekM177/ciclo_biologico_del_trypanosoma_cruzi.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fukuselumetu.myartsonline.com/asot_test.pdfIn PDF document text
    • http://mobukug.myartsonline.com/gemivekixuboxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/telimivefogujolof.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/cdc_isolation_guidelines_for_rsv.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/74384106776.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/3766430765.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/jolly_phonics_worksheets_free_printable.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 6564 bytes
SHA-256: 928e09de078f9ab34f4dcec48335af5c915cb8005c02e3151db7995fa798799b
font_01_sfnt_off00011d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5D 5336 bytes
SHA-256: 0fdd5e08dd96b9e09a0f907022211739463c3e2fca7dbf92747ebcb155c3c84a
font_02_sfnt_off00012f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F91 8804 bytes
SHA-256: 44a9316c68a71b1101a285547362274a3feff1b3a902c30009183ebf1f660dda
font_03_sfnt_off000140cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CD 2456 bytes
SHA-256: 8c26cf3d1177bb280bc98bce2f30468e86dec648efa468a9e8c8377e3d3812d1
font_04_sfnt_off00014a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A68 12276 bytes
SHA-256: 84690ff859ee0aa873c61b6e223e3676f61a3819053a4ddd6044db7a9ec3092d