Malicious PDF — malware analysis report

Static analysis result for SHA-256 19468f68fad04a67…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 11:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ad183bc8e0ee7f2c8ce768e162a943cc SHA-1: 0bdda235360ecc54788caebcb7eafa1833a6a3ba SHA-256: 19468f68fad04a671adc6da2618a89c8fc9e5a0933a6d5b746c3785d0b55acde
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'SE_QR_LURE' suggests a potential QR code redirect, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://catamma.ru/uplcv?utm_term=proper+nouns+starting+with+s PDF link annotation
    • http://travelbilet.ru/sites/default/files/file/66742829555.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210917232321.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/larebemufipekeweposivubo.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/xebelobuduteb.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/15697687166.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134303d8a92d---regilamopujekefikobepib.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/9832594478.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021910102277860.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/kajabo.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/xijeka.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/pigaminalizilekenitelogur.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614097b6374c8---pujujeradidevuvofa.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/9346481882.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/8050173559.pdfIn PDF document text
    • https://techlan.pl/files/file/getado.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/rogoferunenamepujobeluwe.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca728020e2---67163065826.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/51621543078.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210906214810.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/vibedikenino.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9f5b30d8f---mekikexup.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_off0000d59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59C 19464 bytes
SHA-256: 6a29422fe4b85f38a028da0ab73b610e0f986ecfa00b0aee5a14e46f6cdcf730
font_01_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 10672 bytes
SHA-256: da769cabcbeec362c0bd9de06dfcdfa8d13b1835f23990c9b304fd0f00d39bd0
font_02_sfnt_off00012078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12078 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1