Malicious PDF — malware analysis report

Static analysis result for SHA-256 afea192efceddcdd…

MALICIOUS

PDF

74.4 KB Created: 2021-03-31 01:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ecafa32a16cc06727b35b6fc7020dfbf SHA-1: 88235931cb2f5d231dfcf6f6635dd5a86e16e02c SHA-256: afea192efceddcdd70278f53754d3744790495e1acd8f5db4a61b44ed824ea06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are SEO-farmed, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=st+charles+east+high+school+ranking PDF link annotation
    • http://povisowalikim.scienceontheweb.net/4271621678.pdfIn PDF document text
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/mowilipuvitiwavowe.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/djejjge/tobetaduleverorobanulu.pdfIn PDF document text
    • http://suvolupijiro.mygamesonline.org/carbonyl_chemistry_practice_problems_with_answers.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/5147254.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/62675823780.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/mixosufolikowan_konetedawoforib.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/84c9317b9afbdfc.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/dibOgd3/mine_engineer_jobs_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/hfielRp/70099370208.pdfIn PDF document text
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/9227733.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/jhUjimt/38267674809.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/d1OdhdG/93374151720.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/29354941127.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/2b8cc6f8-22af-4e5b-8c83-cc96ad883bd0/the_intelligent_asset_allocator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/fixegimodevexanufi.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/45452326579.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/fundamentals_of_heat_and_mass_transfer_8th_edition_hardcover.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/causative_form_multiple_choice_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba00f421-b332-4646-bd68-1679713dbf11/object_oriented_programming_tutorial_c.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/ireport_new_line_in_text_field.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385fd9dd-e2b1-49af-b647-a285f10ab00d/ziluwasafawe.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/dna_the_molecule_of_heredity_worksheet_answers_biology_corner.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/bjt_transistor_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/54314250839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8fff20-4893-4f01-a037-c6a8094c9d49/demotedenom.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/video_maker_app_with_song_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/kenetrek_mountain_guide_400.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_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 5228 bytes
SHA-256: c7a674a365f60bae67e2358583f41b1e0b430cffd4b7cfe9b49710bf657fe5ed
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 11616 bytes
SHA-256: 987c3452b1f12a3404cb5e131962c95cd7ce0bad30f749b96e11e78ee966e4c6