Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e2095c06af6f2c…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 14:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f7013251653cc0407d8bc5deb0a59231 SHA-1: 7f966955149e2dad2ab306769afab0a07bd2020e SHA-256: 56e2095c06af6f2c47ecd4bde5c9edb45417f1156b6d3e2f0a36eb8ca1216b42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous URLs, many of which are part of link farms hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ketchas.ru/uplcv?utm_term=gameshark+codes+for+android PDF link annotation
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96873013268.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145db2de1268---51239893202.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/16619864953.pdfIn PDF document text
    • https://zakazspbwatches.ru/upload/files/jexumawufijenuwutakin.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/lolamiwibotibon.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/wexedorowidibawew.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/tunekumipavuletap.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/gadofidujabuladonexug.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/45798451795.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/verapebis.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/baxoxajodixev.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/48141077283.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/52115717342.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/95354171945.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/gudesapefudevapo.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/14847799965.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109222109101872.pdfIn PDF document text
    • http://rafaelokazakov.com/file/bipazonidu.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f1c00827c479fdde7a613858cf9a04ae/puver.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/zotilapulozurelaj.pdfIn PDF document text
    • http://goldmustang.ru/files/files/37047987569.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9c8f872e8c7b14aa0b370aedba388386/lugerutorijixelawikor.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/marurekedo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613435551cc93---2690506481.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/mezomawipi.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_off0000b1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B3 10728 bytes
SHA-256: 4a4dd6e73cfdd4e7fe27a8e4aa01826fd78dd5ad1f1f1b751556ec9d8ccbad5b
font_01_sfnt_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 15440 bytes
SHA-256: acd923960ae8d668964e829f12bdc59138c7528d121a431ebec832db5094bc52

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