Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8302f2407474de7…

MALICIOUS

PDF

75.8 KB Created: 2021-09-14 07:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 356ff6798414fe2522423d3d4e39d14b SHA-1: 0505f3431561b3114f5b772c7258db2ac2dff769 SHA-256: d8302f2407474de74b408546d454a45a522074486f127102e6448fbbf71ca525
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. This suggests an attempt to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://traffictkt.com/viking1/uploads/files/rovamafojituvorojepagema.pdf In PDF document text
    • http://objets.immoweiss.lu/userfiles/files/69404142035.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/86185640418.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/33242345518.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/38524703150.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130916270d61---3594966258.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/lipomu.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/45061491569.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/biwojesedadez.pdfIn PDF document text
    • http://evola.it/userfiles/files/12354997558.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/81289761104.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dalet.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396b8ea1a1d---fujofasamanamibimorib.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/77985875939.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/rutufegidibifinunuvifir.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/20787889415.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/wewutalanamomar.pdfIn PDF document text
    • http://jaqalsports.com/files/file/26382293212.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/kegomesikore.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/66193643203.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/nunujorat.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vugakexejupodimox.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/cb4q7d2nh4k2c71m7cm4f4hgbo/xuxagosikutenemegi.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/paforupotowobenu.pdfIn PDF document text
    • https://socardan.com/userfiles/files/zuvorot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+kontakte+mit+gmail+synchronisierenPDF link annotation
    • 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_off0000c020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC020 11004 bytes
SHA-256: 962668bad8cbb132249c2249f717e1269367fd0b7bb62a2285013786730863cd
font_01_sfnt_off0000d954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD954 18204 bytes
SHA-256: d992f7edcf27ed5fc774abaf9a6d479b83af4bcee4cac1132260e1f2cba21a45
font_02_sfnt_off0001077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1