Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c40972b0903eeb7…

MALICIOUS

PDF

70.3 KB Created: 2021-03-12 13:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 23e1b93ae9e7b7ff60c31b4dee2b3c6b SHA-1: 5152edf78a4c84e2ff0bea4e899dddcb4d5596ba SHA-256: 3c40972b0903eeb739a51703c9236cc62ca06fb9a0aaf1bd34e6c17e3e90e87f
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://seumenha.ru/wix?keyword=elemental+workshop+osrs+key PDF link annotation
    • http://zathkatow.xyz/libro_de_biologa_1_de_secundaria_2019_contestado5pkw1.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/iZ05orP/7_wonders_of_the_ancient_world.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_602468189573d.pdfIn PDF document text
    • https://nepagezefo.weebly.com/uploads/1/3/4/4/134472827/baseraguka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470688/normal_603e8d93d54b9.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/xO8Vgjw/subway_surfers_codes_2020_real.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fe2e1dee5011.pdfIn PDF document text
    • https://milavunaxowe.weebly.com/uploads/1/3/4/7/134717052/dbd2e20aa570b.pdfIn PDF document text
    • http://testvvd.xyz/gevefotuzebafivorue4n4f.pdfIn PDF document text
    • http://clyb-wylcan3.space/51401490662q3bbr.pdfIn PDF document text
    • https://tatedamemod.weebly.com/uploads/1/3/0/7/130739791/baxere-tivosijafevona-xesanotibal-kegubak.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/wopibemujefukamuletufepev1e22.pdfIn PDF document text
    • https://cdn.sqhk.co/seduregudire/iciboIR/rope_hero_3_game_download_unlimited_money.pdfIn PDF document text
    • https://lejalapu.weebly.com/uploads/1/3/0/8/130874477/8095b3f0ec7bf21.pdfIn PDF document text
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/jijoxazukomib.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/7ae97789-ede2-4b22-ba03-ce3faf14176f/the_way_of_perfection_teresa_of_avila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ce0331-75d2-41fe-b73a-95969f72b43a/dell_optiplex_755_sound_drivers_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/bepapapofarosa.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/14612599275.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/phoenix_browser_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/78858563956.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FC 5276 bytes
SHA-256: 3823caa6a013026d6b4172c84a0efb7d091120b1a543bb9f861fc65f52ebefbe
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 10076 bytes
SHA-256: 3a55e00749ffe29c15ee2eb1cdab49c9ce25d37c5f81909e212bb4f7c70ad623

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