Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb1d312d9e22b3b…

MALICIOUS

PDF

81.0 KB Created: 2021-09-01 05:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b37c24932af6caf844e1376f76c40523 SHA-1: 234126917ffd48b91347e9ae113af05ae72057b8 SHA-256: 7cb1d312d9e22b3b506e12b9fa82e927730e8655f2757d01f5bf6c245f399a10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely used to redirect users to phishing pages or download further malicious content, aligning with the characteristics of a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://infrive.ru/uplcv?utm_term=santiam+pass+weather+forecast+5+day PDF link annotation
    • http://chinoboxingclub.com/clients/36032/File/25256228281.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a515f0089859383f1639d0823c11be27/bepabedisepowukinedos.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/vawadixadaribonoxika.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/199604986.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/jerumivajesegulivepobina.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/damavudibilerepikidatip.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8f6614ede---13023912494.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/96056917354.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/bukujojo.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/92313030457.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/27821794048.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4e83976f3---rowarazo.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/39563145137.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/futigemipodelisumaje.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/63736333903.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/1n5v1i1m4s0ngbg3blbs35g7ou/40303213752.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/da7e8d8e5cb179edad1519f88f692efb/weramurezanidelalozakufu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/16abfs03g2gu8f959pefqrs6df/71352711497.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a217f3ea6b6---bomesuzer.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e3264e58c76e532e2f8aa6bca369bffd/zekeki.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/11199513442.pdfIn PDF document text
    • http://chichen.asia/ckfinder/userfiles/files/72148177194.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/laborexulopimilekamer.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be15597a1---xofodo.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086a06fbca04---nusunadizoman.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdb3e14c1c---85408072315.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nds7bsnu7ejkh0slts4ttpqv20/3625671437.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_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 11248 bytes
SHA-256: 5f310d0836a5b528e675ffd458796092d65ec6e3e9e659e1a30ba2360cda7973
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 17016 bytes
SHA-256: abc9a5a15ba16f9e1b4c7ff62f3d9da192e57607a56107955d383b1b2cd166cc

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