Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebca0673a322f23…

MALICIOUS

PDF

81.7 KB Created: 2021-03-12 20:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8f41232562bc469de9e1dfd699013a6 SHA-1: 9f57aabcf87ac9e34fc15ecbc276c2ed981eebc4 SHA-256: aebca0673a322f238d6528484408c30e370a2f2fac322ab061356361baeabb8b
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 0.9954

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=act+reading+practice+test+pdf+2020 PDF link annotation
    • https://fukenavu.weebly.com/uploads/1/3/0/8/130813663/6413137.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/noxijeberogakilexisora.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/bunefawuxasafe.pdfIn PDF document text
    • https://sedesafatowezu.weebly.com/uploads/1/3/1/4/131437285/6512607.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/xufakugunovepo_rafepusin_pimadit_pijugesa.pdfIn PDF document text
    • https://cdn.sqhk.co/xufuwejaxe/hhhjzgj/facts_about_kobe_bryant_wife.pdfIn PDF document text
    • http://testertumentum.space/information_governance_interview_questions_and_answers9840l.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/taxak.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/djhIiis/abandoned_jurassic_world_fallen_kingdom_mod_curseforge.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/igii67D/damosewun.pdfIn PDF document text
    • http://luzikudejijes.22web.org/makerere_university_admissions_2019.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/what_do_wheels_signify_in_the_bible.pdfIn PDF document text
    • http://pro-konditer.com/7-2_reteaching_similar_polygons_answersy0b5d.pdfIn PDF document text
    • https://mesenogixu.weebly.com/uploads/1/3/4/7/134736765/7350092.pdfIn PDF document text
    • http://itclick.pro/tunisian_crochet_simple_stitch_tutorialsyduz.pdfIn PDF document text
    • http://watercart.ru/momujujevikueiu2.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/tupofelasujewas/36106073691.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/does_2006_honda_civic_have_timing_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/10799489906.pdfIn PDF document text
    • http://fozilixugijuva.epizy.com/how_to_get_omnisphere_2_cheap.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/6573395022.pdfIn PDF document text
    • http://jefesati.rf.gd/el_juego_de_la_viborita_que_come_manzanas.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/pirates_of_the_caribbean_medley_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/logusi.pdfIn PDF document text
    • http://nigojelur.epizy.com/gomipigakasotofise.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/lugife.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5556 bytes
SHA-256: e69749c8774f1c8a3cde494baf651c25f7081fbfbf952d10b70e957190ee7eeb
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10204 bytes
SHA-256: f8e66bc1e4f81f9e7db167f90199769432fd51b9a00d807f6b690ac185d82fa7
font_02_sfnt_off00012371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12371 16220 bytes
SHA-256: 3c7cc8ae067af2be950886b4dad48a8bcd39dc6fddcc0714ff1a8f2c30be0771