Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b6a5427f7b3bb8…

MALICIOUS

PDF

75.9 KB Created: 2021-09-05 21:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5803daf15b8d22dbfe7051e36eb71636 SHA-1: dc3d365e1817ac43c60f333ba8b828e5a9eeb89c SHA-256: 14b6a5427f7b3bb81a2920ac5636a77cf4188c0c7c136f9378f2725102e5765a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/bbcf265df5a378e689b95a6727295e06/10673706927.pdf In PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083adae4c9cf---fuwovobikoregegerabu.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070323f9986f---76590002516.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e0a7685180e6958e7af4c96fc9c793b8/zawowujeniferejuperoweda.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74d34ea08---21457695611.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/22117576120.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/dhpt6qkichfufb3ho5utgfgr9j/74491183519.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/aee64aa86bb9f0e637814cc46d6443c8/wutumafabexizoz.pdfIn PDF document text
    • http://teraval.cz/res/file/najonizega.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc2a54c157---xisegeposakavixiba.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/jofifovaxajutam.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc9019d63---jepumelak.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16074b4e8535f1---4338815486.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/funopafadudevibowukiret.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7239c12e70---togowovunaj.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95ebebd56---41882170627.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/508be94763e800dc797fee72104f13a3/pinetugozupefan.pdfIn PDF document text
    • https://terracell.info/images/file/87561723669.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/lejinedakixisigenibupij.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/vibepu.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/mutigude.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/7f4d04471184d85c2e177be3b9a72717/sajiranugelewaf.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/wubipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=rationale+zahlen+%C3%BCbungen+klasse+7+cornelsen+pdfPDF 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_off0000bf99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF99 11580 bytes
SHA-256: eaa9426d9e673101ad8cd275ba1e835a5a1afe58d7ff82b3488b53728c2369b1
font_01_sfnt_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 17576 bytes
SHA-256: 45bef5866082d4164eec96846c587fcea7c17878ff5d6eb668955d15d3762f77

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