Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba469fbd9a34883a…

MALICIOUS

PDF

75.8 KB Created: 2021-09-09 09:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3ae2da1e561db2e204f8188e8819dbfd SHA-1: 6180ddb708347a9bea308264fd9d7f6d4a6348fe SHA-256: ba469fbd9a34883ab66039bdc658bb81804bc9d62932ed4e7b184d61a60c8ce4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers confirm its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://savoie-outils-coupants.com/ckfinder/userfiles/files/70672642002.pdf In PDF document text
    • http://nationalherbo.com/userfiles/file/66857599553.pdfIn PDF document text
    • http://ktcz.eu/files/files/4887662406.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/jidirexeredanobusi.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/noduzafezob.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/demudorenedimud.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/fudatogusoruf.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16131f6f05ec36---ruwokowisosodafasuxitu.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/romevolajugopunefikezuza.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161343373adc73---widunubitegoxegaxamibapas.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/ponugegivobimitazobipiso.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/52701972401.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/koleridutezetovibe.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/paxufewipigumudusutit.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/wubivi.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/28704511746.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc146ccc45---49267759673.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613266a1de432---73771235299.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/57526709524.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/sonewide.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/45602199420.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/guvutukeronas.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/tepedusexepir.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613951a15f50f---3656902667.pdfIn PDF document text
    • http://metapolar.hu/tmp/zarukunadav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+root+android+for+freePDF 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_off0000c5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 17272 bytes
SHA-256: f31cbfe74ebc2b834e90d366bb57609a057b8b2cdce7f582b4eb6b366b63cfe7
font_02_sfnt_off00010a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3F 10208 bytes
SHA-256: 2c9014da9e9f65d05b4be3b66a501858b31b80f45f3346088c5c15321981ebda