Malicious PDF — malware analysis report

Static analysis result for SHA-256 1469fe52665bc031…

MALICIOUS

PDF

98.7 KB Created: 2021-09-04 15:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0444effa63a8268dc3e3c00e74afe1d1 SHA-1: 97b0272efb4c09cf353f10c5d07476065b2fde5b SHA-256: 1469fe52665bc03181a8088a9d9f8005fd4df6266868a9e25c693f99cc8f8448
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body was unreadable, but the heuristic firings clearly show the intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sng3ufaesgfkdi7u8lavhh7nmg/nedekazumevudunoz.pdf In PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/49323400458.pdfIn PDF document text
    • http://allasclub.com/campannas/file/3630921500.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1610bd5335f894---95568451158.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0520f66829397a2a47c580f83021ff4f/86019160956.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/mobinat.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/kh7n46f92quprrsap848lpme52/32882079465.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/xutupefimu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/060e246e7c450671d4b156f3801c798b/guzego.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/4c89e7202399c0f84befa08607b6f6e4/fokefuvosinobafowuwuve.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/25765914104.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/67428886669.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210814023041.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/72777191521.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/fudidipor.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e2c9dbf563901a4989d2c2012275e66c/moboxuxijaw.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c031e27664---31500916641.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/83403277743.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/99502768613.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/piwosipotebowevuret.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/33966251602.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/zodivuvibogor.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fcbe6822e---64554052915.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5090c530b27ce5035e23f7f9be5ac757/85129907421.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/samur.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/xomilobexedeneniratiwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+cite+pdf+journal+in+apaPDF 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_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 19884 bytes
SHA-256: b2417c1b54790bcba158b4cec5c1ad2ed15426412701634dca190f6248a249ff
font_01_sfnt_off00014be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163FA 10752 bytes
SHA-256: 200410e3c17ec70c39c3f55c2afb1e4ac48f23b90a1332e5629dc4ceeb68f4c1

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