Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1bc5e9b1ac1b808…

MALICIOUS

PDF

71.2 KB Created: 2021-04-27 11:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3856ff0901ae5e83bdd1bdd00674982 SHA-1: 12177574d05219528a99f61cded728ded2f82d65 SHA-256: f1bc5e9b1ac1b80877ff5c4c27f6f4a56d29cdaafdb7bed22160eee32fea08cb
156 Risk Score

Malware Insights

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

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 0.9960

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://midufefew.ru/strik?utm_term=eton+radio+spare+parts PDF link annotation
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/nivumu.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwozigef/cjhggii/65731007793.pdfIn PDF document text
    • https://jevijoju.weebly.com/uploads/1/3/5/9/135978445/tusudavokid.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/PFhaSnU/guess_the_picture_close_up.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/120_ml_a_gramos_liquido.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/dmMhigd/jugebu.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/41958833001.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/how_to_cite_online_apa.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/ford_555d_backhoe_bucket_for_sale.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/xigifeviroxetiboruvebu.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/22891683474.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/oqgS8id/zulujolog.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/castrol_magnatec_professional_10w40.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/jetovinesededubajupev.pdfIn PDF document text
    • https://cdn.sqhk.co/solalokazili/x7ji1jb/61359843848.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/dumupa/75962953888.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/99219762617.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/biryani_telugu_movie_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/cute_dolls_images_for_whatsapp_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/cfdocument_save_file.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/97722856028.pdfIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/braun_series_9_cleaning_station_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/walmart_albert_pike_hot_springs_ar.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/jeep_cherokee_sport_2016_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/43969111170.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/75071754554.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_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 4876 bytes
SHA-256: 3cde2ac86c7a1eefe87fc5b3de88204e37a3261d4779afc0eee6628ac1668bca
font_01_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 11548 bytes
SHA-256: 13b46012493081753b46a2b3db8d7acf5ae3337aaad727d3d417d01a9872d9c8

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