Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cae413281c5988…

MALICIOUS

PDF

73.6 KB Created: 2021-02-08 20:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 18dcdbc3443c1ca38d98786af3aca6f8 SHA-1: a3c7e6e56059b6a87c220f18f44af720ffc2338b SHA-256: f8cae413281c59883c9f095f769a3387e356c52ccbaaff435aa0c884cf2f0205
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=gully%20boy%20movie%20%20pagalworld%20hd In PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/416ee6.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/7CiajaD/tiger_shroff_all_new_song_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/ifBOmkE/metal_slug_3_mod_apk_unlimited_credit.pdfIn PDF document text
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/titejawabalolivomano.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/gatomadetufutoma.pdfIn PDF document text
    • http://mjawebdesign.net/guess_the_movie_with_emojis_bollywoodc2f93.pdfIn PDF document text
    • https://vixezikuf.weebly.com/uploads/1/3/1/3/131383943/221966e2ae9db.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/rulezemedigijemej.pdfIn PDF document text
    • https://venefenotufawu.weebly.com/uploads/1/3/0/7/130775800/2109081.pdfIn PDF document text
    • http://webmastervlad.ru/hoja_de_4_columnas_contabilidad_form55rqz.pdfIn PDF document text
    • https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/xewipidunudupiw-nojafu.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/hiicrjg/mofuvebojajuzenavixaguvor.pdfIn PDF document text
    • https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/b7300ec.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/7hfigic/zombie_shooter_zombie_io_exchange_code.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxurotowikofew.rf.gd/45024534927.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/balderdash_crossword_answer.pdfIn PDF document text
    • http://ridabus.epizy.com/san_diego_zoo_animal_planet_episode_guide.pdfIn PDF document text
    • http://javasuk.epizy.com/factual_report_text_structure.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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5620 bytes
SHA-256: 57523bcf2f37294622a8bdd9b93aaac58d71694fc0bac620a0d3d9da51c06b78
font_01_sfnt_off0000f4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F1 10660 bytes
SHA-256: d07ffbac5a1518c0431cc3055037f2c36c9a244cd24d0ee9d42ad6beab971972