Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bfc336acef5f7b…

MALICIOUS

PDF

89.8 KB Created: 2021-03-29 00:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f60c897caec6cd2ebcc2f11a4f78e263 SHA-1: 1508b4b1518ce7714622860dfb0efe6b3ca76f96 SHA-256: 32bfc336acef5f7bf79515bdfd66e49d25eae043d6914c23923090d1b75e226e
186 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 0.9964

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/award?keyword=big+ideas+math+geometry+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446289/normal_6042e4b9718e3.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/fuiaLji/84584669270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_602aae5988794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477638/normal_5ffe914e0b5bf.pdfIn PDF document text
    • http://teksol.xyz/feretekenetinabezakcl.pdfIn PDF document text
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/sojudubujegositib.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/bankable_project.pdfIn PDF document text
    • http://lighttravel-ng.com/9961818749247a9u.pdfIn PDF document text
    • https://dapinolun.weebly.com/uploads/1/3/4/7/134762022/7320558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_601774ac1ae46.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/gfYdjhh/spider_frog_pet_comic.pdfIn PDF document text
    • http://asta-stroy.ru/who_tb_infection_control_guidelines9dnvk.pdfIn PDF document text
    • http://jufanurozud.getenjoyment.net/kereju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_601db898baac4.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/1467e.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/368Kjap/minecraft_new_update_2020_game.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/advantages_and_disadvantages_of_twisted_pair_cable.pdfIn PDF document text
    • https://kusagurapatavo.weebly.com/uploads/1/3/1/8/131871515/tepabifuwimen_xisuveli.pdfIn PDF document text
    • http://nasty666.space/avenza_maps_pro_gratispygn8.pdfIn PDF document text
    • http://begetus11ppz.xyz/waxemaxifawewijewunevulopvxbxy.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/hhA6hbO/oh_butterfly_song_free_masstamilan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_5d3ecfcc214649c1973b32d5684de11a.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_4869cd7c38014a028fac514c979371ea.pdf?index=trueIn PDF document text
    • https://e518440a-9440-458f-9a08-48a017ad8d08.filesusr.com/ugd/bca722_9ebdc4d7d30342b7810799acf150a70e.pdf?index=trueIn PDF document text
    • http://revudipepofaten.myartsonline.com/lurolupinamekadipokimiji.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/the_sane_society_amazon.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_1dca0f37b5e1473d95f9368e1bb26dbe.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_713aab47136448d595062a76a311d74e.pdf?index=trueIn 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_off00011d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D43 5576 bytes
SHA-256: 43f620699b0ea32f62f0a2993aeab3658ef912d7be102b42fac6c0faf6620559
font_01_sfnt_off0001301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301F 11792 bytes
SHA-256: fbd46ddc0172bbc39cb8c58413bdbc1ba84ab3f7466aa9213e7b1b8693131c32