Malicious PDF — malware analysis report

Static analysis result for SHA-256 702cf3a3d8ec0f84…

MALICIOUS

PDF

89.4 KB Created: 2021-08-13 22:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9752f7f3e75ab1de551147e2b99f2729 SHA-1: 2ddf85946beeef33d852ef8d714682b771caa801 SHA-256: 702cf3a3d8ec0f845ba43f5cfc02f88d0467dd7e424b0d86066c3fa1a2c7e9ed
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of embedded URLs that form a link farm, pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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=what+is+the+seed+for+skyblock+ps4 PDF link annotation
    • http://pphjako.pl/userfiles/file/wabidemop.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/fujepori.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c02c98684ba---mekixikuw.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/lisedu.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/49179368519.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/wewuze.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/46702978156.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/hbfivqsrcjjg7q5jb9pjcpfbub/muzulosowokexosusot.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160850526e68e8---25541877929.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/79168311909.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/lo8g0m8lcqer2uv69chg6qhcj3/3972463413.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/86401061054.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/lagalazetebisalezojijo.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/fekalurekapuwezirolura.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/77831618804.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/2d25e277f153709974cccbb0e8ee3a4a/42866596885.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/limipokoxidobetazufo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0730b469---bagesifarodil.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/zujakuniwefalub.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/82886794617.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/962b7ebff6e35bd15bda658921256074/27338517526.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/fefozukutav.pdfIn PDF document text
    • https://andrejc.si/files/file/nolelutinojowikuwaxaxube.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 11032 bytes
SHA-256: e6a2dfed67bf838e37c0ed14e8fc5b925057a486dbe53050fbe1cd63ebd94a2c
font_02_sfnt_off0001285a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285A 17556 bytes
SHA-256: 0cb31f14780a7cb767fa2e142a113e8c5a0826ecffc56870977991cb9723fe16

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