Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0afca8dbbc94e0e…

MALICIOUS

PDF

84.1 KB Created: 2021-03-20 03:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b94b04916c451e28fd6db64334891eb1 SHA-1: f9d83439dfb49f0410dd235584e5fd665a64e522 SHA-256: b0afca8dbbc94e0ea971c56a8972b1b2c80964116245df88571bc365d55898b1
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://pelibifir.ru/wix?keyword=the+metabolism+reset+diet+pdf PDF link annotation
    • http://flowerport.store/19407028989sfgkf.pdfIn PDF document text
    • http://citrus-fruit.space/how_to_connect_printer_to_wifi_hp_deskjet_363069rlj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_60389386103f8.pdfIn PDF document text
    • http://all-system7.work/beery_vmi_scoring_form01gzx.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/14703221709.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/the_body_electric_yoga_facebook.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/article_writing_examples_for_students.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/small_scale_broiler_production.pdfIn PDF document text
    • http://ferabugajefelam.mypressonline.com/definicion_de_psicologia_del_aprendizaje.pdfIn PDF document text
    • http://reduslim-ufficiale.website/33558630713k1nez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_60067cdc22117.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/newisit.pdfIn PDF document text
    • http://xasumemazekejo.scienceontheweb.net/comparative_anatomy_of_heart_structure.pdfIn PDF document text
    • http://xaxikobovivo.22web.org/xitekanevifobajig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_6038edb940572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365602/normal_5fff25244b2ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwibigebozodeg.rf.gd/jajuxu.pdfIn PDF document text
    • http://ketagarewetene.epizy.com/monster_high_videos_youtube.pdfIn PDF document text
    • http://juzofomixul.rf.gd/capitalist_development_and_democracy_rueschemeyer.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/syllogism_examples_with_answers.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_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 5372 bytes
SHA-256: 051e3ed4645a0b4ebdb64994a46bbc51733d23934efb8944b0dab7f63d5dc27f
font_01_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 11204 bytes
SHA-256: 1841252a7d7097fe0de39860dcd9c1672404c0c3e78fd660d55d58eba3d97288
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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