Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f44f369f2871fed…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 01:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 446e464f4d8ce5f051332b8e247991c7 SHA-1: 9e2f6fc1d70944afbacc841eacb9023856965dba SHA-256: 6f44f369f2871fed7cbfa40768194320ba5775153232011f0bf0cf3b5d2ef087
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to game downloads. The presence of external URIs and a link farm heuristic indicates an attempt to redirect users to malicious sites, likely for further payload delivery or phishing.

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://jacksth.ru/wix?keyword=bluetooth+multiplayer+games+download PDF link annotation
    • http://twenty-promo2020.ru/4934527619281u76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_604e0d776b465.pdfIn PDF document text
    • http://triple-doska6.club/baby_girl_birthday_songs_freehqcf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601c8809c6d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_600fef38ee5e7.pdfIn PDF document text
    • http://rivimebowov.22web.org/voot_colours_tv_show.pdfIn PDF document text
    • http://biteroz.iblogger.org/your_uninstaller_2017_full_crack.pdfIn PDF document text
    • http://muxusapefon.iblogger.org/81952699880.pdfIn PDF document text
    • http://demask.space/fire_guided_light_lyricszluzy.pdfIn PDF document text
    • http://weraka.online/avg_pc_tuneup_free_softoniceon4y.pdfIn PDF document text
    • http://wivejudotimog.22web.org/sports_betting_strategies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fec795180b63.pdfIn PDF document text
    • http://fijeveg.iblogger.org/camera_shots_and_angles_with_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_600e5ec4770af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/84269394815.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/sketchup_for_mac_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ef8b53-1da5-46bf-b2b1-5f9c2808a9f6/10180504262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508bfa01-e479-4690-a5e4-e917b14e1511/mezupofapeg.pdfIn PDF document text
    • http://bozizivaposenu.epizy.com/53927297723.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/sedupazoxejita.pdfIn PDF document text
    • http://tunawibiga.rf.gd/all_brahman_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d02445-cdc4-40c8-9480-8da04835f8eb/the_secret_garden_1993_similar_movies.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 5616 bytes
SHA-256: ebd45f8929c1e8abe775254994ee595f0b59fe3973d5c2e5a8976fd4865c5138
font_01_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 10648 bytes
SHA-256: 6f367ff26b3d047870309962e2db789a62f8a2bbe9c603783f3276c3c6c69f47

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