Malicious PDF — malware analysis report

Static analysis result for SHA-256 787214ce0a9d09e1…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fe7b5fb6e21854d43d8a0d26510af90e SHA-1: c42011757e81ea3ec6e813de470fd724b046ca50 SHA-256: 787214ce0a9d09e1dd394e92a1249b6afd9e39a3045c4e205ab9711ea04559d0
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites, suggesting an attempt to deliver a payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pre-www.bridge-college.com/uploaded/ckeditor/files/50972484790.pdf In PDF document text
    • http://chickendaylacrescenta.com/uploads/files/rakigusigibexexetenifetu.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/37590212894.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/16310881261.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/wizubewarekometazegamemet.pdfIn PDF document text
    • http://kag.fr/userfiles/file/sefeme.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/wotabivujufexem.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/rinamap.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/dml6cjkgmsg9sgt4mifgo92soa/44204921801.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/kidatexida.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/dawod.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/47474319554.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/likexitupenovanuzus.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1d745c680---waped.pdfIn PDF document text
    • http://slr-eyewear.com/slr/userfiles/20210917001933.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/55863803012.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/43048516356.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/170737435762.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161313482af03c---1422243440.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/pidobafuferuvujezolosulax.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kodidokomuginapabopujugo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360e3cd8c55---lutofuxuteradunedozotu.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/55319613702.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/41633775769.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/70606834417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=web+pc+suite+apk+downloadPDF 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_off0000d9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E3 10820 bytes
SHA-256: 307a7bfa241a2000ddc79a98238bc5a1ad252565250223baca53e3c8fc74d031
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 17376 bytes
SHA-256: 4141ef655d12fe7a1d409a8af795697aef578c4e5f015dfc31ccc2774430b0ce
font_02_sfnt_off00011f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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