Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d15ec4b6072a5a…

MALICIOUS

PDF

86.1 KB Created: 2021-09-16 21:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beeafb1982f6d3d63410e805a12aa8af SHA-1: c60e1a2e66b3ed47f67a8dae0b7bb20bf804b0df SHA-256: 57d15ec4b6072a5a99ca3bc5e55461e13012829cef70d94706a1de97de22a944
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external resources, including a suspicious URL hosted on what appears to be disposable hosting. The heuristic firings indicate this PDF is designed as a link farm to distribute malicious content, likely a phishing lure or malware downloader. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crewmak.ru/uplcv?utm_term=pokemon+light+platinum+mega+download
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/8rrqjvv27t5mkima11jfm1g6i0/8990667318.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/79782015435.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613032255a663---74206541785.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/wizadisowala.pdf
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/morema.pdf
    • https://sunridgecorp.com/uploads/files/202109090410408426.pdf
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/pedebaxudosobasuvo.pdf
    • http://thaisomboonautopart.com/userfiles/files/47311472506.pdf
    • http://atenngo.com/admin/sites/site/documents/70700279227.pdf
    • http://bc-arman.kz/ckfinder/userfiles/files/lidibidukekevivofu.pdf
    • https://bayihoki99.com/contents/files/rijusutofixixaxuxulew.pdf
    • http://drapa-technika.cz/UserFiles/File/kikuzivaxewezowotimutupav.pdf
    • http://fujiya-la.com/uploads/files/23354150255.pdf
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/19962210991.pdf
    • http://alompar.hu/uploads/content_files/files/81031809266.pdf
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/54516728940.pdf
    • https://cplastik.cz/data/cms/file/79721526715.pdf
    • http://shijijiaming.net/filespath/files/20210913051149.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a0e6073651cafe6a21fea679669fc4f9/rasozivo.pdf
    • http://nasfthr.com/userfiles/file/93848174990.pdf
    • http://regalmotors-jp.com/js/upload/files/22812718072.pdf
    • http://veterinariacomportamentale.it/userfiles/files/74825072936.pdf
    • https://globalcircle.club/userfiles/file/65024017951.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e4.bin
5aa857798b79b0d23e85f92524720a3538c6ceda04a90ce3ee5597fdfde0cdd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 19696 bytes
font_01_sfnt_off00011a66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 16792 bytes
font_02_sfnt_off0001327d.bin
8d42a641df612c8ccef70700648741d2b7c896937569dfb3393bed731c4a8def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 10852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.