Malicious PDF — malware analysis report

Static analysis result for SHA-256 f944bcedacfe20e9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-15 00:16:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59ae8b58a52ca6676c3f7699a1e11b26 SHA-1: 6d06c01af0f3af71e95004016ce5e1996b63791f SHA-256: f944bcedacfe20e9eefe0896c9317bb7b1e4f2ac65a52a9d80f210e65ab126c1
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=accurate+psychic+readings+blackburn PDF link annotation
    • http://cashfree.store/how_to_reset_drum_on_brother_printer9x3lw.pdfIn PDF document text
    • http://ru-order-687646765445.art/bleach_3d_games_for_pc_freefqzk9.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/manage_reports_in_public_folders_salesforce.pdfIn PDF document text
    • http://bluebadge-support.com/godus_wars_reviewo68xe.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/mowiroxajctbob.pdfIn PDF document text
    • http://zawezumibinigot.iblogger.org/4_types_of_emotionally_immature_parents.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/etymology_of_religion.pdfIn PDF document text
    • http://starconflict-game.ru/tanuvexebupob1wojr.pdfIn PDF document text
    • http://metalllift.ru/81531898706vael.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/61090646939.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/aprenda_alemo_sozinho.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/92799332357.pdfIn PDF document text
    • http://lelobuz.rf.gd/highest_common_factor_worksheet_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/17909708488.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/machine_learning_jobs_near_me.pdfIn PDF document text
    • http://jojajixinoxu.epizy.com/jexoronimenixetuvene.pdfIn PDF document text
    • http://jokosen.atwebpages.com/d-in_unlock_tascam_cd-rw900sl.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/cuisinart_12_cup_coffee_maker_walmart.pdfIn PDF document text
    • http://kosigasarem.epizy.com/gebexusi.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_off0000db83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 5632 bytes
SHA-256: c8526ee36f4c4af05408a30171e465d579e60f9a31a1650a7f301d36b1760176
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 12228 bytes
SHA-256: c15eb5f27150eeea2ecfe7573626a398c3438a28606cdc814dec4372e7291ecc

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