Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b22d84eb0198ac5…

MALICIOUS

PDF

73.7 KB Created: 2021-03-10 16:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 16d430990773ccc31c27bad8aaf3ca31 SHA-1: 3cb0a0280d87d6cf5ee9626179b4e675e906c5a4 SHA-256: 7b22d84eb0198ac582828e02f738c31d3f0f74b6ba9be4c3b5bd2afb756b1f96
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/wix?keyword=dragon+ball+z+piccolo+shirt PDF link annotation
    • https://cdn.sqhk.co/vopofuxo/Vgdzijk/black_friday_2020_best_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/5vRjjcF/adafruit_sound_fx_board.pdfIn PDF document text
    • https://cdn.sqhk.co/sofawaju/z6jhwid/black_nebraska_uniforms.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/8893084.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/cavitation_corrosion.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/6ghdhew/true_surf_hacked_account.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jexicML/head_basketball_cheat_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/dBNaXhe/36142068287.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/lekosudo.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibapufe/6iiF31Z/top_scorer_2020_21_premier_league.pdfIn PDF document text
    • http://bamupiwabibajew.mywebcommunity.org/sumuzibigeximikukexik.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/87736822795.pdfIn PDF document text
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/nozadutu.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/VieewqI/38235247530.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/jhjG6gf/guns_and_glory_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/gegj7So/64924857407.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
    • https://s3.amazonaws.com/kavifunaruvi/xomenafatejunegiziv.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/fourth_grade_spelling_worksheets_printable.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/what_are_the_characteristics_of_assets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727c70e2-5948-47ab-aea5-5b1080df0b94/bleach_cycle_to_clean_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc2f8d1-f56e-493b-b5a7-2a4023026a31/42199178852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b87e95-bb2f-46bb-8e35-7f73e5f0e8dc/quem_no_sabe_onde_quer_ir_qualquer_caminho_serve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61387faa-8ad0-45af-9ae8-9ef5690c28df/why_is_a_diesel_engine_noisy.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_off0000d418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD418 5052 bytes
SHA-256: 11e00701dec187bc4fcfd2cc72f871c177c5f49fe0556c2467d5ed1d1229c30e
font_01_sfnt_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 10824 bytes
SHA-256: 97ad6d5d6279795906e68ad8bbac2995617effa8cb54c61747543148cff25559
font_02_sfnt_off00010997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c