Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e077eab448a753…

MALICIOUS

PDF

76.7 KB Created: 2021-06-07 08:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9affbcc763354b73d11adf5143928453 SHA-1: 0baf32c77db671085354dc57dc77d1b1863c79c5 SHA-256: f7e077eab448a7539b9f66268b4c3e3ae968c8882d321338370349df06fda325
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://garglob.ru/pbw?utm_term=all+blue+power+rangers+ranked PDF link annotation
    • https://favujoki.weebly.com/uploads/1/3/5/3/135302790/f8290.pdfIn PDF document text
    • https://nubonikajifubi.weebly.com/uploads/1/3/4/8/134882340/4353798.pdfIn PDF document text
    • https://zorazuzibenad.weebly.com/uploads/1/3/4/6/134617736/luzar.pdfIn PDF document text
    • https://sonoxezepokamev.weebly.com/uploads/1/3/3/9/133999938/dulagapitezut.pdfIn PDF document text
    • https://vuvunovugigadi.weebly.com/uploads/1/3/0/8/130814714/0d14caaaab5213f.pdfIn PDF document text
    • https://nigelatadumave.weebly.com/uploads/1/3/4/6/134615228/51e1905316bdb4.pdfIn PDF document text
    • https://kekebamifibem.weebly.com/uploads/1/3/1/6/131606854/kemam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144483267/what_is_kali_username_and_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c96edf7-397a-4516-8cd2-4ea0f0807b8e/how_to_make_word_file_smaller_mac.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144608664/club_car_precedent_gas_rear_end.pdfIn PDF document text
    • http://subazim.pbworks.com/f/how_to_transfer_verizon_contacts_to_new_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea070702-18a0-44d1-b389-7e632fda2851/best_smart_watch_under_10000_with_calling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9eea78-5cee-4fcd-849f-989f102c63b7/lines_composed_a_few_miles_above_tintern_abbey_lines_1-22_summary.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/f/lebakutuxupepezetutet.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423342/strong_adjectives_list.pdfIn PDF document text
    • http://daxulesep.pbworks.com/w/file/fetch/144727284/bullet_force_hack_ios_no_jailbreak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd811f98-3bb3-4775-a2ae-32ee0539124a/tracfone_galaxy_j7_sky_pro_user_manual.pdfIn PDF document text
    • http://daxulesep.pbworks.com/w/file/fetch/144728634/how_to_make_calligraphy_brush_on_procreate.pdfIn PDF document text
    • http://sidotafawe.pbworks.com/w/file/fetch/144756861/xolekanop.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/1333294061.pdfIn PDF document text
    • http://lewiwebula.pbworks.com/f/bancorpsouth_routing_number_nettleton_ms.pdfIn PDF document text
    • http://jananevava.pbworks.com/f/83370388466.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5164 bytes
SHA-256: c65b00cd3cbdea95cff3934ae0bb3c59c829f791b5f36becbd35dd014fecad81
font_01_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 10100 bytes
SHA-256: 488f3d843b36ea3f96fc323c50cad219635c02b5adff9ce7811111b052187933
font_02_sfnt_off000116d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361