Malicious PDF — malware analysis report

Static analysis result for SHA-256 de674dd07d886266…

MALICIOUS

PDF

97.0 KB Created: 2021-04-02 09:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 291df60f0de79e21afcebda30d5998d6 SHA-1: b5502f851b86695412ac17b95112249cb9309202 SHA-256: de674dd07d886266301cb9f0abe9521d1b8a3f3b79dd209b2de717b5a5405419
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://lozipotod.ru/award?keyword=angular+5+tutorial+pdf+free PDF link annotation
    • http://mists.space/timolol_davis_drug_guidemxfri.pdfIn PDF document text
    • http://fb-ig-copyright.com/broken_glass_wallpaper_for_android_hdww5kc.pdfIn PDF document text
    • http://busivel.xyz/359560659455anmm.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/jblAgdZ/17402905817.pdfIn PDF document text
    • http://life-news.tech/acrimony_full_movie_freewflzx.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/bL6hiQU/sibisilofi.pdfIn PDF document text
    • http://strgb2.ru/cours_arcgis_10._52xu2h.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/hiOCigd/bounce_ball_chair.pdfIn PDF document text
    • http://abistrans.ru/nafulupisenosisafazi41t7r.pdfIn PDF document text
    • http://kittyplay.online/427480210926pubh.pdfIn PDF document text
    • http://detonic-italy.website/prison_architect_safetyipphd.pdfIn PDF document text
    • http://vas-rem.ru/cura_retraction_settings_anet_a8a18n5.pdfIn PDF document text
    • https://cdn.sqhk.co/zixifazod/BiVEgj5/valesixuvawa.pdfIn PDF document text
    • http://iwhite.space/laburerudujiruut3n9.pdfIn PDF document text
    • http://lessonsonline.site/50412958402ir53b.pdfIn PDF document text
    • http://alcozerox.com/161081997583gosf.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/c6ba2aa6-72ec-438c-8bfa-9d16d9cf266d/why_is_main_idea_important.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_30739f01bc9945e3bc7c1f78240e90a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f771ec-d326-4eed-9b78-741c9c538456/pakewabawefajuzulevutaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9a4329-4d84-4b1a-ba02-83f044dff536/what_is_the_sum_of_interior_angles_of_a_12_sided_polygon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df631d33-85f5-4658-bd71-4311268d2243/bapamigexawidesodu.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_9bebbc20b30e4253853ee938a0eb3255.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B66 5144 bytes
SHA-256: 34df7036a25e2968d4284d2d5651d46364163da6421d67c190cb4208b19bdefe
font_01_sfnt_off00014d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D00 12248 bytes
SHA-256: cd3ef272f2c680d27c2d5a2072e985685d37045dee05a6dfb65a1bea446c65cb

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