Malicious PDF — malware analysis report

Static analysis result for SHA-256 6182d264f1d0d9b3…

MALICIOUS

PDF

72.3 KB Created: 2021-09-17 12:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e84c45bf29cef0cd7ca0228a4c19959b SHA-1: bfbaa266eeee49cbcf57dcb13b918ddee1c9cef5 SHA-256: 6182d264f1d0d9b3a29d09bf16a24348b10f9014c7e44d739be5619b4e45f1f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS platforms. This suggests an attempt to lure users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ezgoe.com/10005001208290177/ckfinder/userfiles/files/77995026818.pdf In PDF document text
    • http://jcpingie.be/public/files/wulodeberibogogojekariso.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/62091628888.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/8927682426.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f19ca69dbd---26904763552.pdfIn PDF document text
    • https://tigapilar.com/upload/files/kotefadarexokojitas.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/48387763794.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/zevoxakupelutamuza.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/tekonulo.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b48e6cc869---18386624796.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/fexukuwomiwuxodazig.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/55810193391.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613328edb6a32---zodidaj.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/15555513901.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/jaratowo.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/62032655426.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/kulelotajinezubu.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/wezawapomunum.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161445323cc39b---kajeferudipoxosewux.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/xuzib.pdfIn PDF document text
    • https://premiersuli.hu/files/files/rasujotizopokujidop.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/wasazinorututupovor.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/dovegoxinowutamefelok.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/mumiwino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=watch+a+killer+among+friends+online+freePDF 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_off0000b9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F3 11008 bytes
SHA-256: 9c4fa9a6cd325b044ee16e0f902c37c7270e7a9011f934cf18ea7b39f0e156ad
font_01_sfnt_off0000d32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 15712 bytes
SHA-256: c116786e4cb2c4b7928b3dca1d10a8766db5be400fb9b037fa542cf94ee9d3d9
font_02_sfnt_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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