Malicious PDF — malware analysis report

Static analysis result for SHA-256 0274eebe920b3cc2…

MALICIOUS

PDF

93.5 KB Created: 2021-07-31 13:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e7891c16f99669f1cd2d7f963e33263f SHA-1: 8bd7e2723957d0214dee0555c9e2c8c937e1a09f SHA-256: 0274eebe920b3cc2b284a0e1b2f0fe2f792e53c7a2dd6ae408081c987ccc2bc9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm to redirect users to potentially harmful sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic findings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://daisytalavera.com/userfiles/files/juretisawi.pdf In PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/t3srgt6cj6qnt4e55750nq58nd/41557416618.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3e01e0f1b9e80572ad2909d7c5042c06/58227298532.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/96763320181.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/47305229871.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb373ccd2---37203921995.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e8bb69b1---41847646149.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/vivipugutadek.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/10526772369.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/91296356450.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eaaa31de5---reragenovi.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6f746844d59a533b586d3323f92eb5e8/83897330425.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/75807214925.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/62403435583.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084fdf00e0a4---52872036492.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/67537487411.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/60660603eec3dd4d1ea3f9240b280a1d/20204382919.pdfIn PDF document text
    • http://billsky.ee/files/file/dujosolose.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/300010415345.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8j6c8kt1q2r8thgi77m2600re0/darenebus.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2744fca98c---fiviwomavosidusiletu.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/92297347763.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/84cf9029d8875b896c4309e200615299/bivaraboxidojipitejoxewod.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e3518e08a4eb0610eab5cea6038d7a4/32642474602.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/66307843119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mickey+mouse+ears+diy+templatePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 10872 bytes
SHA-256: 420d589676db8a6bc905eb65165f22a0e9955001434a626f438c93bc706a699f
font_01_sfnt_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 17300 bytes
SHA-256: 902a587293dea2cb6ad59580cd4204abf0ead2a6a8f66686151242d47f5e6b63
font_02_sfnt_off000138ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000150bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BF 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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