Malicious PDF — malware analysis report

Static analysis result for SHA-256 1491e2880d1e3deb…

MALICIOUS

PDF

70.5 KB Created: 2021-02-01 00:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 01926103ad7769b829eed18dbe99a73d SHA-1: 4b73c05e1bed801420fcdaea8401240be5a016f7 SHA-256: 1491e2880d1e3deb1a52d827ab5e40a577a5b1888ebebd44a0af074eea3a42d7
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?utm_term=being+independent+worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_6014052a79373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392660/normal_60047ee01f7db.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/rizilewanevunivuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/gzS65hg/9471138120.pdfIn PDF document text
    • http://bamasadukarudam.iblogger.org/l_r_eswari_amman_songs_free.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/buwivuga.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/veworo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodonevubepivor.epizy.com/tinaratixuwurisajinak.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/job_hunting_ielts_listening_answers.pdfIn PDF document text
    • http://zofududa.rf.gd/anaconda_2_full_movie.pdfIn PDF document text
    • http://lavovexerok.epizy.com/adk_map.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/dawexopur.pdfIn PDF document text
    • http://kipirigup.rf.gd/wuwajumiranifa.pdfIn PDF document text
    • http://sugajuze.epizy.com/xekidizozoroz.pdfIn PDF document text
    • http://zugoxovok.epizy.com/english_letters_wallpaper.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_off0000d7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C9 5184 bytes
SHA-256: 7cf021fed8be16feae0af06de6a40b5195882664df77b6169a6810c7767a05ee
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10680 bytes
SHA-256: bddaf2a736bcbfa25fb70d26738ce596c97c11f816362beb410b872eae27bd44