Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e5e72ef85cbd1d…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 00:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 75a1dd50c87151516f9fea64b6b906f8 SHA-1: 64bc05fede1732af33f04855b17641221a8f1103 SHA-256: 73e5e72ef85cbd1dbbbd3fb85f4450235386a477f29020e07da05944610e8ba3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://philabc.ru/uplcv?utm_term=pokemon+go+hack+apk+joystick+2020 PDF link annotation
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/aptjmv4gfe0cj2dvur6iu1ct9r/ledabanepefapemezito.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/93375298995.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b652f7046e1db295c180e47399f7ce22/fepewodimasit.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/dabemipevofifugazaxuje.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/vafelugobazodisonemozevug.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/61382285092.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/2381401353.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/mipumeredomadux.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/jujosoris.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/miraxu.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/vufonajezumuzamagunipa.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161329297a7310---50737894904.pdfIn PDF document text
    • https://sergiomauri.com/images/file/66604895842.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/vadutiberokifinubifijeb.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/xawojuzurafabujikukap.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d647b312e83f20373965dafa98ce8757/pakomiwu.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/61028464770.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210910171621.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/ludugarefuvudezusaboduv.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/85651512792.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/sasuxu.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kijikekiweretes.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/58366649965.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_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 18124 bytes
SHA-256: 629189bece330e1a3d5578e2bf65c496676238af24cf055923398a94472ae488
font_01_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 11256 bytes
SHA-256: bfbfa8218cac28d8fe442f7b3f46308e69e8fc986e72fe244cc0697f7346eceb
font_02_sfnt_off00012a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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