Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f42070400388efb…

MALICIOUS

PDF

73.4 KB Created: 2021-03-11 22:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f1bbb55176570684dfe79435b52ac718 SHA-1: 1bab45528253b460298065748fd3f16860d85db6 SHA-256: 1f42070400388efb46f396c3889d7f9a716e22c08d3ffdad2d99e17a4bc12d78
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 0.9956

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://bologen.ru/award?keyword=apologia+de+socrates+pdf+descargar+gratis PDF link annotation
    • https://cdn.sqhk.co/gugosobor/jS7hejc/jac_board_result_2019_class_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5fe8724e1e434.pdfIn PDF document text
    • https://magirodimape.weebly.com/uploads/1/3/1/6/131637482/pudezajonide_wokefegomil.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/7738340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_6049e2e804786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_601b187766eee.pdfIn PDF document text
    • http://komikewewi.iblogger.org/83020960866.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/8757382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_6012774c427cd.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/o3vhc7d/rawegema.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/bt9ribs/onedrive_download_limit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5ff89a8267e05.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/rulijut.pdfIn PDF document text
    • http://dukobotabagujam.22web.org/industrial_biochemistry_lecture_notes.pdfIn PDF document text
    • http://tedalaz.66ghz.com/wuvapotapizozi.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/gdIPiau/sebidug.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/81dec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botasalipigu.epizy.com/inventing_merit_badge_worksheet.pdfIn PDF document text
    • http://zugosixefi.epizy.com/surah_al_mulk_meaning_in_english.pdfIn PDF document text
    • http://vubimebuno.rf.gd/chick_fil_a_job_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/2989806442.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/formal_articulation_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/26297062222.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/28035247416.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/45654886029.pdfIn PDF document text
    • http://zilisugifep.epizy.com/how_to_fix_garage_door_cables_video.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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 5312 bytes
SHA-256: 91e9188d445f53d445622640166aafe168655c9b5b95aba8678fc5e596267aeb
font_01_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 10196 bytes
SHA-256: 17b40f4e57e33a668c284bb2d2b15e8da48b12895d4f324f8eaad6df2b539ced

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