Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c1483b8521d969…

MALICIOUS

PDF

107.4 KB Created: 2021-04-01 13:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 815f36298475832f23b93970a487bad9 SHA-1: 7944e4bbf395b12d670d8bb5c99d074dadc7a115 SHA-256: a4c1483b8521d9699dd602a727504aab459848cd63aa857988c2ba4e0d9f7239
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to disguise a malicious link. The embedded URL and the document body text both point to a fake job search, designed to trick the user into clicking the malicious link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=hudson+county+schools+of+technology+employment PDF link annotation
    • http://mail-autoscout24.net/dungeoning_idle_dungeon_crawler_modtd7e5.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/nisomonifutexifuviwojig.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/how_to_define_climate.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/nepafuje.pdfIn PDF document text
    • http://vashmaster.info/how_to_determine_change_in_position_from_a_velocity_time_graphq73fa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/think_and_grow_rich_the_legacy_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/pudawemuw.pdfIn PDF document text
    • http://stavki.link/nature_beautiful_hd_wallpaper43ix2.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/laminate_sheets_for_sale_adelaide.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/armitron_watch_manual_45_7041.pdfIn PDF document text
    • http://mivetys.xyz/60050399433l04ge.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/74cde827-a2a1-4e48-998d-693fbb4ef7a7/dds_discount_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1021c0c6-317f-4ece-ba3e-8ef6fea874de/how_do_you_trace_a_long_lost_friend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490a2c01-1ba0-4eb5-ab7d-8417edb7b765/16126695639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5aaab9-0b03-4c5c-8666-18fb6fd44521/94371993284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42526abc-5275-48ff-8b1f-30bb99a3299c/how_to_turn_on_dyson_v6_absolute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f852eef-d2ad-408b-b142-5e001c9ba7d7/suwajewelasopom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cae1559-4c40-42c0-946f-9a3c90b68474/gataso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ede8f2-6787-4531-b3b8-fe105c7ee6ed/bosozewoduboreju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6effa5-1275-4558-9e0a-eb9159223663/stress_management_lesson_plans_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a143e240-395f-4b71-a8e7-e1031943c6a2/zixotilitejevoxefeviro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574ed665-0d71-48b6-b751-014168168285/garmin_93sv_vs_94sv_vs_95sv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4808143f-37b5-48a6-bd72-eec7ef920b63/58712298648.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15008 5328 bytes
SHA-256: ede449e6968bd172b553028aefd1a47709cadb5a4ff58b084f12655282d7067d
font_01_sfnt_off00016218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16218 11216 bytes
SHA-256: 1e6e2709bb333518377fc0a58388b478d907c0a1c2a327573724af13f738559f
font_02_sfnt_off0001882a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1882A 16728 bytes
SHA-256: 1c2d7b51a53df8709e4815dbf62dc11714cf0ad45a09eec1ff6f34786565b069