Malicious PDF — malware analysis report

Static analysis result for SHA-256 e702aebb276dbccc…

MALICIOUS

PDF

92.2 KB Created: 2021-09-07 12:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 216029181757c0c50d949f7a66a176ab SHA-1: f15e38ad4aa32bcb6078897ff2cace4790059498 SHA-256: e702aebb276dbccc3c4107adf5dec2b441b3dcce8b82e326ffde713ae2314ca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://smidgel.ru/uplcv?utm_term=applied+behavior+analysis+manual+pdf PDF link annotation
    • http://bettaletroom.com/file_media/file_image/file/gukiligat.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210625191955_2087157679.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/sinimupanolin.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6769f7f146040f1459c3c05d9fcb1959/8944891914.pdfIn PDF document text
    • https://amgaa.org/temp//files/jogaw.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/ziwirogikixibimol.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ebf8eb61e366788ca13a0d1ce7c58074/xetoluroxigaferuxil.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/xekuwozimigupodovizeg.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/debifixapexukite.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160af6c47af14c---41979861184.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xunago.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-8-25/20210825035004469731.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160738569ed627---tibanaz.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/7101712446.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a896e5b5fc9924b5e00cfc72504f4233/fokukogu.pdfIn PDF document text
    • http://arablift.net/userfiles/file/pidagapageluw.pdfIn PDF document text
    • https://506hlapeta.com/files/file/takejuzumuzederi.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/87017516771.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/50563256225.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/97028289567.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/2b3d45690f11e8f94c4fd7b4559b8b25/zaxobolegupafogitukuz.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/lefakanesurawagov.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127741b817cc---16870656245.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608df2ae9db61---selezozigojab.pdfIn PDF document text
    • http://mcutech.net/upload/2021/08/file/1628269123706031321.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_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 11068 bytes
SHA-256: 1b83b646ab3ef17ba43f0b34694abceff725200974b6e4f663fc8fa4cf25fcb4
font_01_sfnt_off00011a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3F 18596 bytes
SHA-256: da3de60a6776b2b3a447b8d7864f9a014187428a1d2bbf01a0a869de2954c012
font_02_sfnt_off00014ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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