Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa27b6856d05468…

MALICIOUS

PDF

95.1 KB Created: 2021-09-05 22:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 216d886ff67f89b25398c7a6cc27493b SHA-1: 85dd856b9b934c02e2eb2017189cff31c930de77 SHA-256: 3fa27b6856d0546826fca17bd4f4af87a970d0a6c891048e8f98ca9a1a03db08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://crysiq.ru/uplcv?utm_term=maikling+buod+ng+noli+me+tangere+pdf PDF link annotation
    • https://ita.kru.ac.th/ckfinder/userfiles/files/femaw.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/a66beb5efba1a5f5c2062626aaa184d5/davasitigeru.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021080622131468.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/nusezak.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/takuzowavelujonos.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f53c063421---vejovozunexivitaduroli.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/napexixaketoxawadumo.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210814151708572.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/ninenijifililatazulisig.pdfIn PDF document text
    • http://www.heksan.com.pl/file/sebeburusebiludezatuk.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a80397919e5a0df6fa81b027532467d1/dunukorixapuvukekefav.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/runutodanuzagupulokupinud.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/jerum.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/jolepim.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/jm857sc0h9r4lj9qk9ccvn8hq5/kulukofosi.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/rebitozobejedinegozojel.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d50172cf45---tofurutogizirimizegeze.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8b771e2f6---15972865407.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/43729448064.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/20905714480.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/tixigawilumedusunokupumol.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/sulabugubot.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/tanodekiwenekekude.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 10996 bytes
SHA-256: e3dd7d8877d1828baa1c8c69b975e97a5c5758df3d319365b23499054bdcfca5
font_01_sfnt_off000128d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D3 18264 bytes
SHA-256: 697a19a68c3899afafadd7e71390dea5915f069519ffad53af10f89b62946961
font_02_sfnt_off00015672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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