Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0f0a308a912c56…

MALICIOUS

PDF

84.6 KB Created: 2021-08-24 07:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 70fe2c7ec9fe422bb1459283265fbb87 SHA-1: 601e288b40e4502ba19ba1fdc4d2996d9c970f0e SHA-256: 4e0f0a308a912c56e97d73cd60137b48e13dee69907b6c00e6019b5c93256756
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing trojan. It contains numerous links to potentially compromised websites and a heuristic firing for a visual download button, suggesting a lure to download further malicious content. No scripts were extracted, but the PDF structure and linked URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=animate+2017+download PDF link annotation
    • http://rayocazar.com/images/elfinder-1.1/files/file/15638985648.pdfIn PDF document text
    • http://househouse.it/userfiles/files/popodirij.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b80e705feb0---koladi.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/femival.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/xewexufumuroj.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/79794471237.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/39079190308.pdfIn PDF document text
    • http://hangquangauto.com/files/towegazuturemirevativuf.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/21006029504.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/31473380567.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9eb2f505---75836472610.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/vefedelusikilujol.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/metejeto.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/97993900466.pdfIn PDF document text
    • http://ux-school.ru/files/files/kutudizafanud.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da5ee91f330---zawonosaw.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/tidasuzuk.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/24498986995.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210714_4504BCFCB5143932.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/a930df5d237a1a2666c2266d59586e2f/lisoxogapugufagifidovasu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3bc908eb6cc4f96026ebb3b49cdbe6c9/46510322261.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd622d0b534---9774951704.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/83941199860.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/90099136884.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_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 17064 bytes
SHA-256: 3e0c76d22a3c5f13eb6693c32cb80384f48dc44f97ace3c4aa4d1b207582fde0
font_02_sfnt_off00012be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE0 10552 bytes
SHA-256: aa2a32882c7117b8b1c698b0949cf2a0c7463bd42a10d34821471d660cd46eff

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