Malicious PDF — malware analysis report

Static analysis result for SHA-256 771333125b4876e9…

MALICIOUS

PDF

71.7 KB Created: 2021-02-25 19:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: be0ca1a0e36524ddc5aa435fb32228a1 SHA-1: 411319f06153ca4727fc632da2754319674194e2 SHA-256: 771333125b4876e93b4c368244be939094274a9bb5b4fb43abbabda031f91b98
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/award?keyword=albert+einstein+books+pdf+in+hindi In PDF document text
    • https://cdn.sqhk.co/pabukerofo/j9idYia/nevudaxonigit.pdfIn PDF document text
    • https://tisuzozolida.weebly.com/uploads/1/3/6/0/136087901/1726388.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/pizetelaxakozodemibasaga.pdfIn PDF document text
    • https://pavuxutekukos.weebly.com/uploads/1/3/4/7/134704216/kiwawenef.pdfIn PDF document text
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/firoripixidorufaz.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/vabiwuluv-gifazifipijare.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/3_words_8_letters_meme.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/how_do_i_share_a_news_story_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/ifKePjj/favinajotefonupoleb.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/98393597289.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/adobe_photoshop_step_by_step_tutorial_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/kubiseda.pdfIn PDF document text
    • http://togewogovimome.epizy.com/project_cerberus_1._4._5_apkpure.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/sony_str_1050.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_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 5112 bytes
SHA-256: 1bc162ada46cd7d9b57a6cc5c32e09b76d687959cdedc6c0beb49a22d6eef11a
font_01_sfnt_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 10132 bytes
SHA-256: 45fdba988b3b4c4b44d4828a58727152627553e6bec48989049ea9b45bdd73e3