Malicious PDF — malware analysis report

Static analysis result for SHA-256 c792d12016718b8e…

MALICIOUS

PDF

78.5 KB Created: 2021-02-25 06:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f5512067dacad1fc2d2a21974421bda3 SHA-1: 213a5b6b24b379aa112cec0230a386cf2d7ea9a7 SHA-256: c792d12016718b8e669b5dd2e6cf6d841d0bfdfc06de0fa28a95e14b0105a35d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=oops+i+farted+again+song In PDF document text
    • http://xoziduso.mypressonline.com/kobuvapavalev.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/que_establece_la_ley_de_ohm.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/chapter_3_carbon_and_the_molecular_diversity_of_life_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/eNjfkhb/bivorajazuf.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/HQjgggd/dufabokixumu.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/hi5jcgj/recette_sandwich_mou_sans_machine_pain.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/jdihrgj/carriage_kia_in_gainesville.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/nifNgiK/tasuzas.pdfIn PDF document text
    • http://xefapase.iblogger.org/android_listview_adapter_notifydatasetchanged.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/ebhdrmd/bugs_bunny_no_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/uhiikJj/scentsy_warmer_of_the_month.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugenerefajujus.atwebpages.com/how_to_get_certified_in_ccna.pdfIn PDF document text
    • http://velefaluzi.epizy.com/roblox_game_no.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/55017754771.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/2158586628.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/chopin_prelude_24_difficulty.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/geronimo_stilton_collection_books.pdfIn PDF document text
    • http://depevatumelo.epizy.com/17559281585.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_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 5204 bytes
SHA-256: f732a1c563293463415bb335f326b856c09b72279682020a7f149ca9f55d097e
font_01_sfnt_off00010a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 10152 bytes
SHA-256: a2f0136521bf36fe473277837e4f7817c539f4cc7d6e24c9f05f121235ac0670

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