Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dd3440d4d8419b…

MALICIOUS

PDF

73.1 KB Created: 2021-03-04 09:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 62a33114eb7c6dcc4af40f5b81285eb2 SHA-1: 99d8fece2dc5de771be1f790871eb665cb070d95 SHA-256: 52dd3440d4d8419bb8a958da5a4dd5ca77bd6abec179b877c02ce4fadfb55a5c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=terry+eagleton+what+is+literature+sparknotes PDF link annotation
    • http://nevinidonet.mywebcommunity.org/majedin.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/58062520876.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/zunivunokebi_siraj_nozawegulate.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/12455754517.pdfIn PDF document text
    • http://salonlabs.xyz/free_super_8_film_overlayn8v17.pdfIn PDF document text
    • https://cdn.sqhk.co/koporikog/QgiqHOY/zoxaputusijiroli.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/fDiacIx/golden_boot_2020_mls.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/6ijhXgf/unicorn_baby_lullaby_songs_go_to_sleep.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/349ca6ee.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/drum_rudiments_poster.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/putazagaw-mexabizax-kowevipetoxefav.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/yNfigjd/8831954854.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvivemu/gfiiEgc/nba2k19_dodgeball_time.pdfIn PDF document text
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/jinuguzenuzawud.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/FxGijaI/sanatorium_name_meaning_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 5288 bytes
SHA-256: bfd03390a4d54b346da3f61d643dfc5d3cbd4d5ab255c59bd40f0eee1b45e43a
font_01_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 10104 bytes
SHA-256: 78477a8318946cc897dbfb497e2ef364bb314154391096d574c765f131e95db3