Malicious PDF — malware analysis report

Static analysis result for SHA-256 5562617947da1bbc…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 22:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5f5c534a654ef461dd75798b1db6b465 SHA-1: ddfa6aae97f0df513f48274ceebc297a37565829 SHA-256: 5562617947da1bbca28228b4e2f7f9c7176603e2e20066106d9141c45cd8b2fb
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by a machine learning classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior.

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://mezovuduw.ru/123?utm_term=airdroid+app+free PDF link annotation
    • http://lazujifoxupa.getenjoyment.net/33616796468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_604a9eb80ffbd.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/HjgZhjx/vovasidobuzarawores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_604f78c5507a2.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/zefes.pdfIn PDF document text
    • http://trylait.pro/princess_diaries_2_castle_locationeqbxf.pdfIn PDF document text
    • http://myfoxing.online/is_starbucks_socially_responsible5kpwk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_60183c0ad0e8b.pdfIn PDF document text
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/5214787.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/what_is_a_30_day_fitness_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/xCgjIig/notification_notification_sound_manager_app.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/how_much_does_a_ps_vita_cost_in_2019.pdfIn PDF document text
    • https://mizilugodipibo.weebly.com/uploads/1/3/0/8/130813887/7030696.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/3jeiiHq/gofusenub.pdfIn PDF document text
    • https://cdn.sqhk.co/monejipo/Fgidljg/nubozalug.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/8958550.pdfIn PDF document text
    • http://english-10.site/88662072230i2sb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470405/normal_5fcc203a7f6fb.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/if_i_ran_the_zoo_book_app.pdfIn PDF document text
    • http://subfamjtii.site/16194285128bq2kk.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/brother_mfc_8950_reset_drum_counter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fe9c4d0f1e0d.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 4812 bytes
SHA-256: 1541be992e961c4ac12bfe928f26072b2eda369f82b74bf79c2fabb721be5f5c
font_01_sfnt_off0000fdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC0 10960 bytes
SHA-256: 049714fcbb11172d8ce4a4752d21678f318cd3a5a9df23d3b32bc651cde3a746

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