Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7585a9cedbe7b1…

MALICIOUS

PDF

113.8 KB Created: 2021-08-06 08:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7a0f78fcada4a5c0dad3853747752697 SHA-1: ecdbce49adb073f67ea246b236da2c4d1d0506f2 SHA-256: ea7585a9cedbe7b159e58c22a055299ce965971e10d65ab1cc8a9bc12c58f9d8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites utilizing the formcraft plugin for file uploads. These links are likely intended to lure users to malicious content or further stages of infection. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076501f9bd17---xidemazo.pdf In PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/disivimowapekigazo.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b0728271c---kelafefolumejuzikubemerug.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca16822033---48637546767.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa7909dbf---22231856795.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/rewuz.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca45b683e---zepatot.pdfIn PDF document text
    • http://jkohut.pl/file/lorubatajinorowe.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/6366e0993b82ee85e1f950cce9d07554/9579012947.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fbe7f6952d3ec464c25d79c8c732ae0c/baneduzeziruzewu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/af789aff65618f426310bed06ea0d4a4/tosimumepozodotoxijojuzu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa04e318206---75156393187.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/65654488885.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/3892142826.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/5n8ct55cdihbh7ql1nfs91b5f7/zoweduxakugapage.pdfIn PDF document text
    • http://gyobel.it/public/file/73350819106.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a99514a6615---vokazubetifewa.pdfIn PDF document text
    • http://clingac.com/d/files/75031340893.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2238af11b7ded65b591a25fcdd2b9cc6/89838822741.pdfIn PDF document text
    • http://co-mit.com/uploads/files/85107618071.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/0htum309a1ek18l8bqt0l5jem8/gofaduvaxut.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/828ae2f082fd4558eefb11a5b92d3c86/39813565676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=what+is+frayer+model+of+communicationPDF 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_off00015954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15954 10948 bytes
SHA-256: b092f3a10b94fe34f3f590af3a21c91d013cbf1108b85bb0986a0cb8bfda6562
font_01_sfnt_off00017296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17296 18212 bytes
SHA-256: ada84c9421c6187821c34027840ef439bf849a6d2cb05cc563d320d1975a85f1
font_02_sfnt_off0001a0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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