Malicious PDF — malware analysis report

Static analysis result for SHA-256 244f1e1825d925ea…

MALICIOUS

PDF

71.8 KB Created: 2021-03-04 21:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 802d3d08de6c29e488465a3bfce3d7d2 SHA-1: df3397cf1eb1922400d8b13f523186aee8b04f9f SHA-256: 244f1e1825d925eac21e199144f742a275a3830c1cb86b18b0cd66dbdf4692b0
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 0.9998

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://zajinet.ru/123?utm_term=the+curated+closet+workbook+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457311/normal_602da6bfe4a58.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/hn5ic4s/jipuzokuke.pdfIn PDF document text
    • http://wwbook.org/60461534049pz9dk.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/bzYjegg/air_attack_gunship_strike_2018.pdfIn PDF document text
    • http://lifeit.pro/sas_ods_graphics_designerdeu2p.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/zokir.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/60790031116.pdfIn PDF document text
    • http://ita-talia.fun/legendary_game_of_heroes_spreadsheetdkrwt.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/the_lady_or_the_tiger_short_ending.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/modern_romance_film_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426543/normal_5ff0601214091.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/gic3K2e/battle_chasers_nightwar_switch_review_ign.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/cz5heid/19710311060.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/eijdia5/off_road_4x4_hill_trucks.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://uploads.strikinglycdn.com/files/bbc47b38-7e7e-4be1-ab15-983cce32e0e2/how_to_avail_solo_parent_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b5b220-5b07-4958-9228-536d02522124/unix_commands_for_beginners_with_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdef86b-027e-4041-8df7-1bd6dff07f7f/bilisafukavunurim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993e902a-ab45-4d4b-a540-6ffe9fb44f28/rajuvenudobif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da211d39-3f57-4624-8c85-4a607dd9336f/the_chronicles_of_narnia_prince_caspian_full_movie_netflix.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_off0000ce45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE45 5216 bytes
SHA-256: 8cd50315f9b5967b511b6090fe374ba14cf330508f6eda09a22595c9a4e42b34
font_01_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 10440 bytes
SHA-256: 22593a1ce825028f60b8f422f148de70e81604c9224299c56ca071c2584706a9
font_02_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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