Malicious PDF — malware analysis report

Static analysis result for SHA-256 56de7a1d31b0122a…

MALICIOUS

PDF

72.2 KB Created: 2021-03-10 17:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7b00cfa67345f67833f0f9f5fa6ea767 SHA-1: c287d58e4954ce72488ec25c6b25bb5bcde3bc8d SHA-256: 56de7a1d31b0122a0343073ae2a3f2a733fac1c6fee7ff73f507f7beb4ed112d
192 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Movie box pro premium apk'. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification. The primary attack vector appears to be directing the user to a malicious URL, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wix?keyword=movie+box+pro+premium+apk In PDF document text
    • http://nadipewin.mywebcommunity.org/homelite_super_2_chainsaw_manual.pdfIn PDF document text
    • http://aazzzry.space/1698958939514az9.pdfIn PDF document text
    • http://polikarmonolit.ru/factoring_linear_expressions_worksheet_7th_gradekc1cb.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/ijRicsO/pottery_galleries_london.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/gRVhcge/losowiguno.pdfIn PDF document text
    • http://andyhong.blog/riladanadaeectn.pdfIn PDF document text
    • http://reactivascotia2020.com/denuterejaviwereluwufokulfr7ty.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/a6hhjjF/mabomepe.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ohehb53/fortnite_black_hole_mini_game_code_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ifElhgy/european_battles_19th_century.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/HlaNibJ/bandpass_box_for_2_12_s.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/fQghjhH/plain_city_elementary_school_lunch_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/cvkjije/larry_miller_movie_theater_sandy.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/pajifelus.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/eYhfe4h/92841876386.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/molecular_biology_and_evolution_journal_abbreviation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livirava.atwebpages.com/sutojowevepibubolino.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/vulegavunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/57522752205.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/belgian_passport_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/apple_old_phone_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/xevivupabetopifolofofefag.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/55086868093.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/3560180859.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/im_barbie_girl_song_free.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_off0000dfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBA 5092 bytes
SHA-256: f65e44c3d675b8a6efe2b606fa741648a201ef1b87f8bf3c393ce41b8e44db4a
font_01_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 10084 bytes
SHA-256: 4a2beb161de6b76002648e644a4e6562d43b2498fcfb67035bdd84dc7ca4dd56