Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d21d526ecf1e0c7…

MALICIOUS

PDF

79.3 KB Created: 2021-04-23 21:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5d6420a48bdd9505d39037233f20ba8c SHA-1: d6846c41e61d43d255496d7b3aeb21bafc55b0fe SHA-256: 0d21d526ecf1e0c7360e2123e9bb97c98931a4c97b44316061eb54ae5e851614
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=keto+recipes+for+beginners+breakfast PDF link annotation
    • http://warajuvevuv.medianewsonline.com/norma_asme_bpe_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/ddijjja/lock_screen_live_video_wallpaper_android.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/nudozezog.pdfIn PDF document text
    • http://beritox.medianewsonline.com/86392293857.pdfIn PDF document text
    • https://cdn.sqhk.co/titusegik/iekjggh/serojuzazirexaj.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/voratudadumi.pdfIn PDF document text
    • http://dajexori.mypressonline.com/taluredawi.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/essential_thrombocythemia.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/problem_solving_and_decision_making_butterfield.pdfIn PDF document text
    • http://itdomen.fun/dadibagatefovifujaporuvhejpt.pdfIn PDF document text
    • http://retys.space/fufexapasafipexuvizaxtezh.pdfIn PDF document text
    • http://jaxixojuko.mypressonline.com/civil_engineering_building_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/Ojajdie/hotels_close_to_daytona_international_speedway.pdfIn PDF document text
    • http://tekplafond.xyz/380898941897pu7j.pdfIn PDF document text
    • http://sale20.site/nier_automata_emils_headq4v3x.pdfIn PDF document text
    • https://cdn.sqhk.co/sekopanosesu/jjoXja1/33688218835.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/atZvib1/photo_blender_for_pc_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_4c9b856802a74154b59a5e52019e9777.pdf?index=trueIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_56cb218b4852415e9055f7f2972af16c.pdf?index=trueIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/comment_assembler_plusieurs_sur_mac.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_14a733b11684402b8b690971b2d2d170.pdf?index=trueIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_e6990158251f411b8e80b3e478045c28.pdf?index=trueIn PDF document text
    • https://a86b13d2-a9ad-4039-ad74-10d2f7332aba.filesusr.com/ugd/6e2451_915b72dcd4fd4029ad564cc50c4c20fb.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/biopsychology_9e.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/glossary_of_political_science_terms.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_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 5324 bytes
SHA-256: 80e8a87d0024592bfb86262110ce82b0c240700471557c2cdec97a5731dcd4f4
font_01_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 11320 bytes
SHA-256: 076cba0c95b6a44abcb5e4eb523e22fd1ee52c0b168d23a7188a79c84fcec739