Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d57951a7cf52998…

MALICIOUS

PDF

80.5 KB Created: 2021-03-30 21:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 612482b41f2d8a13e6003bf95132d433 SHA-1: 3c3a6185a37f3c35e7a8cacf2c9044c4681db7f5 SHA-256: 7d57951a7cf529983dac20c63530dfe7fc76f20ed23db75fbeb9b770e9b1204f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms. The ML classifier strongly flagged this PDF as malicious. The presence of a URL with a "utm_term" parameter suggests a phishing or tracking attempt, disguised as a legitimate download. No scripts were extracted, but the overall structure and URL patterns indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/123?utm_term=o+holy+night+piano+sheet+music PDF link annotation
    • https://megulotajisotem.weebly.com/uploads/1/3/4/5/134592592/fifogapudikipopip.pdfIn PDF document text
    • http://lumutanopozokox.iblogger.org/etymology_word_list.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/concepto_de_derechos_humanos_segun_autores_mexicanos.pdfIn PDF document text
    • http://copalofa.site/amman_devotional_songs_ringtones_freepesbm.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/why_is_there_a_jumper_wire_on_my_thermostat.pdfIn PDF document text
    • http://wiinorama.website/the_cask_of_amontillado_full_text7gjiy.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/mipevi.pdfIn PDF document text
    • http://xtw2.club/hp_officejet_6700_premium_repair_manualrdi8p.pdfIn PDF document text
    • http://zemojuvasu.iblogger.org/how_do_i_set_the_time_on_my_timex_indiglo_watch.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://rotolakudezi.weebly.com/uploads/1/3/4/0/134041133/a2c57.pdfIn PDF document text
    • https://jutoxanifi.weebly.com/uploads/1/3/5/3/135321179/4c1e36e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d6f76e-55cf-4f89-b980-99bbd01c6c63/ziditumutiveri.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_e412500fdce04ecbb2e0579b40e47733.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d65f86-65de-463b-921f-28cf03368035/99_names_of_allah_in_arabic_and_english.pdfIn PDF document text
    • http://vikuvexujanevat.epizy.com/wutigifawox.pdfIn PDF document text
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_6889a721bfa547a79a5462e7019febb0.pdf?index=trueIn PDF document text
    • http://ketawod.epizy.com/26900063323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c606bf-ca92-4b9f-9044-84e1769e9572/14378979046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5b2646-88e4-4703-beeb-47eb5d5649d3/92907129866.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/63016980236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c212b68f-c20f-448e-9d85-b90b90681053/19314847556.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_89931a7fd72245d58a2dc4770ea5d43b.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 5380 bytes
SHA-256: a70c85cb7ecf526b2c580e1356a579870f66836e7483d360d929ec9c25204ccb
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 11508 bytes
SHA-256: 7720669580771a164f5b4a1453a14e1eb9abdd10aa3c986183244b8174f1e295

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