Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ab55d429eb947c…

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 19:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c005b5f487cfbf6b5c53a653f9bfa7b SHA-1: 91fdc2ce0de455d796027f06ddebece107b7e1fa SHA-256: 12ab55d429eb947c77cfdaa350c131ba4742b96f9ec7604de825aca63c895152
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 0.9996

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://nipisod.ru/wix?keyword=unit+acids+bases+and+solutions+titrations+wksh+%25235+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fd696133570f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_600c21cdf135a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_5ff1b544732c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_60150f19df201.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/cZvPjaz/guide_for_fire_craft_3d_pixel_worlds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5ff0c7a0c344a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fdb58c52c638.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/aQidwn8/bunikenitoxodumur.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/my_verizon_fios_remote_wont_change_channels.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/xVVihNF/72941513312.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/2004_honda_civic_workshop_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/ciakAOR/charm_city_kings_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd2678e0ffc5.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/fjbhi7L/8922691019.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/hjjcgf6/75399497564.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/hjUHidO/final_fantasy_crystal_chronicles_remastered_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/Ozriija/minesweeper_puzzle_tips.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/mejados/ar-15_magazine_loader_wood.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/voronas.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/what_does_viking_runes_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/how_to_fix_volume_button_on_directv_remote.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_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 5196 bytes
SHA-256: 7c7baff6e362a921ffeccf8ceaafa5a36819a786545ec1fd921a5211753bf622
font_01_sfnt_off0000f622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF622 10068 bytes
SHA-256: 53257dfd3d427c77e4676d65a4e47e37def5de535e0f5d9393f78ba8309f33e1
font_02_sfnt_off00011878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11878 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.