Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4adde7859cf4ed…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 11:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 84ad7c21b8645c811de8c32bc5caf0c5 SHA-1: b81a45a3206e4b111eaebda480fc5de77cd713f4 SHA-256: 9c4adde7859cf4ed6ff38a35e9e8ba35e066bdeb088fd0a7b86fd84b34e130e1
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 0.9994

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://xezojetit.ru/wix?keyword=desert+solitaire+pdf PDF link annotation
    • https://cdn.sqhk.co/mavixuwaloz/hjiehgS/traductor_de_idioma_aparato.pdfIn PDF document text
    • https://cdn.sqhk.co/fupetabuwuf/iaKayQi/blade_crafter_2_game_guardian.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/djbOiiU/navojewidojibewo.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/cash_flow_and_debt_management.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/2ojbN0h/sleep_sounds_apple_music.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/bobs_burgers_synchronized_swimming_transcript.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/40469475355.pdfIn PDF document text
    • http://zebisol.mypressonline.com/don_look_back_book_cover_coldplay.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/2y9Zyja/kitchen_island_color_ideas_with_white_cabinets.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/61415890-8d3a-48ba-9190-b1e0a4fe5024/prefix_and_suffix_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/gluten_free_snack_ideas_recipes.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/catch_me_if_you_can_dual_audio_hd_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff16550-0cba-49c2-91e7-91dc2ae555ab/what_are_the_three_basic_principles_of_communism.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/android_version_5._1._1_free.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_b55f0acd32e34d1fbce99fe286d69130.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/bending_stress_distribution.pdfIn PDF document text
    • http://ruronegiseko.atwebpages.com/14372143775.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_193dee8d86954ba6b6a7dfabb4585548.pdf?index=trueIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_c9586f2a9aa14a2593596cfda93f64d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/geological_timeline_activity_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/50821015406.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/183638198.pdfIn PDF document text
    • https://73e8eba8-f08a-4c12-987a-519a82e171c2.filesusr.com/ugd/19159f_7f4c50d98f2847189f33e28157895a07.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_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 5032 bytes
SHA-256: 43e82394a651065009755aec58b0d1f4eed6d7d166bb96ff729818332328ed3a
font_01_sfnt_off00011ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 10824 bytes
SHA-256: 79ae158f1735b71d1bd3af68a6428c22af66876fa608db3211c9a249da442070

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