Malicious PDF — malware analysis report

Static analysis result for SHA-256 72629c6efa45b07c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-27 16:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ace339f675b9365a4fdb13d17ce20d27 SHA-1: d238553e3f8ffd711f50402f66e080e52bdd4e0c SHA-256: 72629c6efa45b07c3b6cd70b9175c30d75d3e92434265448e7e1cfe50052124b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or content distribution scheme. The embedded URL and the PDF's structure point towards an attempt to exploit search engine optimization techniques for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=abatement+in+service+tax+pdf PDF link annotation
    • http://babusokojanog.sportsontheweb.net/catalogo_avon_campagna_13_2020.pdfIn PDF document text
    • https://fesakakosirin.weebly.com/uploads/1/3/6/0/136015409/liwixilepaf_waxabi_magunuma_rajegenedevula.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/kegajom_volala_zexepadavozaxus_minunazewulow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofolimuri.myartsonline.com/english_to_tamil_dictionary_free_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/nike_air_force_1_pixel_grey_gold_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/35276537689.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/will_giorno_be_in_part_6.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/12955261087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ba948c-1a6e-43fa-8ec9-286f32f0588b/ford_mustang_convertible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7afcbe-ad99-4ccf-8907-17b5506f7d25/tolstoy_confession_gutenberg.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/kisixezirir.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/mibowetadufolega.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_eeadc5751a6b4e2b8a9350eb7f74f49c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/byomkesh_o_agniban_full_film.pdfIn PDF document text
    • http://donufuruwitij.atwebpages.com/normal_sperm_analysis_report.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_389017b69d8a46249ff40410965f3aa1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/apk_cheat_game_online_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd78ccb-28c3-4125-9635-c0bed02f89d8/how_to_heal_your_body_mind_and_soul.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_5af33eaf7bbd45e6b914a1532cac780b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/cghs_online_application_form_2018.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5524 bytes
SHA-256: ed020c24c99469f803972c5f7aa9408fcc5b0daedb0624cdad116c6980bfce5d
font_01_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 10720 bytes
SHA-256: 2f684587c109cb44b2ce74574439b64e3f3129c18603b6a0226bf0486994e8f5

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