Malicious PDF — malware analysis report

Static analysis result for SHA-256 069f4549e4db6ccb…

MALICIOUS

PDF

70.5 KB Created: 2021-09-28 18:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 060e3e1ef1d29574e7eb5151e044ba54 SHA-1: f0b089c23e3234093761836fc3903176d42f9b27 SHA-256: 069f4549e4db6ccbabdbdc1943f4e90c6324ed7ddc18dc7f7f2b36a8d4fdd460
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. Additionally, the document features a link farm pointing to multiple distinct hosts, with some identified as potentially compromised WordPress upload storage. This indicates a likely phishing or malware distribution attempt, leveraging a combination of scripting and deceptive links to achieve its objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://foto-recepty.sk/images/fotky/67072684653.pdf
    • http://zhongyuemedia.com/filespath/files/20210927050734.pdf
    • https://aromamarketing.md/img/files/buwaputuxanemal.pdf
    • http://stihoplet.by/upload/editor/files/39861102267.pdf
    • https://siam-royal-view.ru/data/files/2689283687.pdf
    • https://kindeeyudee.com/ck_files/files/44884688854.pdf
    • http://cnpair.com/userfiles/file/47419277236.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/golawenusasegufujanij.pdf
    • http://mrukseo.pl/userfiles/file/pobuxos.pdf
    • http://tbvshungviet.com/upload/files/70784205158.pdf
    • https://onlinendttraining.com/files/59288692031.pdf
    • http://kartinatv.org/uploads/files/fuvazoz.pdf
    • http://finemetal-cn.com/upload/files/pugavelela.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134393c8cb92---40247619693.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b50efaec857b52bf984aec24b20b9a5/luramofevadupoko.pdf
    • http://biaikatolikus.hu/files/file/vaxenosuxotodigozalowes.pdf
    • http://abwingsjanaf.com/uploads/files/moxabarabufebuxotubox.pdf
    • https://salonrewards.ca/images/file/tulidobebenozesovojo.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea8c0e7fa---37798298459.pdf
    • http://carscaso.com/js/upload/files/puxom.pdf
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/77133489362.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe44b5ef5---21456304211.pdf
    • http://oldstat.ww.tj/img/file/2638509844.pdf
    • https://giorgiosantinelli.it/file/jilubitinajo.pdf
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/9309708564.pdf
    • http://colafranceschi.it/userfiles/files/xawewudazutivu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+clear+all+browsing+history+on+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b527.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB527 16792 bytes
font_01_sfnt_off0000cd39.bin
9026c00eb6b927efcaf8375f411dc2f8c84ce2c7880eebaf6a9aa8d2b954eeba
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD39 14856 bytes
font_02_sfnt_off0000f241.bin
1ed7bc0b937a55ca5048f6dde6ca29f68892a68c34ca838a73cac9633c33aaa4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 10980 bytes