Malicious PDF — malware analysis report

Static analysis result for SHA-256 135defb8bb30a998…

MALICIOUS

PDF

70.6 KB Created: 2021-02-15 16:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 97b87d1977be77feabc620bd3df82719 SHA-1: 0467addc3e4532e7c7fa2b5d0bb19acedd5d1d3f SHA-256: 135defb8bb30a99894edc960e64c95769f72cadfa2e9a5d0a6a52ed5a00fb710
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wix?keyword=drivers+ed+chapter+9+worksheet+answers+weebly In PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/bupip_direw.pdfIn PDF document text
    • http://verifiedbadges-form.com/gefiv9a3xc.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/2lgdggJ/tornado_strike_zone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/eyjbyhc/45301366573.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jajedie/pakadovumama.pdfIn PDF document text
    • http://legalvictory.group/que_alimentos_puede_comer_un_diabetico_con_colesteroljf42t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_600df823c36f3.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/ljjkijC/pocket_knives_for_sale_near_me.pdfIn PDF document text
    • https://pidakulosa.weebly.com/uploads/1/3/4/3/134391257/petesilipinit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411481/normal_5ff170875ca0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5fdf9995eb26a.pdfIn PDF document text
    • http://shopbest.online/32363449716kl38c.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/Cicjbje/cupcake_jemma_lemon_drizzle_cake_recipe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_6007df1eec305.pdfIn PDF document text
    • http://invitesistem.ru/sojubisovamei2u34.pdfIn PDF document text
    • http://dasaburaxad.22web.org/fofekib.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/885ec90c1e190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fozidunaleral.rf.gd/rixumisutibobarobo.pdfIn PDF document text
    • http://kegeduwamid.epizy.com/project_almanac_full_movie.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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 5776 bytes
SHA-256: a9c1054bb0c052a4a681a9c343c0e4e8820d3eca64eb13e60862198abc87ca5d
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10080 bytes
SHA-256: 423682461cdc0900f38bb1b8c19760844cbce9c07867e0a2e2e602849a405f99