Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d07f1997eeb54f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 04:37:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff3168f268f89b738078a383b8397847 SHA-1: 72ef0421880f5b53e849c8e268674144ca82f184 SHA-256: 82d07f1997eeb54f8726677d8e770541a00de33278b281b9df9fb83a27110b5a
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to 'what is a synonym for invisible' and a high-confidence ML classifier flagged it as malicious. It also contains a high-severity heuristic indicating an image lure linking to an SEO redirector, which points to a phishing or malware distribution attempt. The embedded URL leads to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=what+is+a+synonym+for+invisible PDF link annotation
    • http://realnoe-obshenie.online/how_to_turn_guided_access_on_ipad6xrpe.pdfIn PDF document text
    • http://wekeb.space/how_to_remind_myself_not_to_eatq7bpv.pdfIn PDF document text
    • http://meetchat.space/zebra_zt410_media_calibrationzn2r3.pdfIn PDF document text
    • http://arendagg.xyz/sistema_endocrino_hormonaska4ts.pdfIn PDF document text
    • http://lazadacostumercenter.com/how_does_paul_die_in_the_movie_a_river_runs_through_itu1o5b.pdfIn PDF document text
    • http://matcobzor.ru/how_many_customers_does_dish_network_havei0dn5.pdfIn PDF document text
    • http://lnstagramoriginal.com/matavezezezawipppul.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
    • https://s3.amazonaws.com/jepavilutabilel/technical_chart_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/best_3d_platform_games_ps4.pdfIn PDF document text
    • http://vavilonogamet.epizy.com/dragon_sky_idle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/sirur.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bullfighting_in_spain_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/xejekefomebagumabib.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/bigomixigewikaxujuxa.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/moxarewisidizizudimox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2798a148-a368-4a7e-b5e7-a574520cfea1/como_se_dice_violar_los_derechos_humanos_en_ingles.pdfIn PDF document text
    • http://fasajixibapa.epizy.com/subway_surf_para_hilesi_apk_android_oyun_club.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/83149383581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f703d75-7bb3-4546-b156-bf20a28d51f6/how_many_lives_can_a_person_live.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/wu_tang_american_saga_season_1_episode_8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 5112 bytes
SHA-256: 363fea03c7e441e534216f1ed16d762d326c07a50b6d999db5277ac7f781d75f
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10848 bytes
SHA-256: 5d5484f664afd1378568b5b5e4f865d1351f17b2749463b53f883b29369afccc
font_02_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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