Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afd8fe90152eb38…

MALICIOUS

PDF

83.8 KB Created: 2021-08-20 07:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a42b221248f41ebfd6dbfac324c2145 SHA-1: 5156288b0e9a92572ea931b3e86e3abf329eb8ae SHA-256: 0afd8fe90152eb38acb48e77a635f25d4249514c9317fee92a2a78c5c061b584
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious content. The embedded JavaScript is a common method for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://findmealocalpainter.com/insurazon/admin/userfiles/file/19863912866.pdf In PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/5dd1d5af869c3b307baa3044e3853bdc/rurosajivogisusaweduxume.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/82738882655.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/86939639109.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/a698da65cc405be3e35c0a7b54cb8c81/javapuzumarafusepe.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/dikomafijilojeluresipir.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8371aa6a1---50588613210.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070125ac03f0---27051801498.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec79ca4fdf---38809162219.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/lolusupitorudofukoxolo.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/94963979686.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b817813f6e0---42809034369.pdfIn PDF document text
    • http://allasclub.com/campannas/file/80496996354.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/da12c63234c1b5ff9e4b6c6f46544d75/90540477805.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082f95a91802---fuwerokazefixuv.pdfIn PDF document text
    • http://www.bandungmesin.com/file/poxobabesudixefatamu.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/18323978095.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wujozapazoga.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/vibovu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/d2cf64bf82e05c9371495261100cc2b1/27142624642.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/gutexivebixebo.pdfIn PDF document text
    • https://ijpdua.com/contents//files/siguxazoxazoruvabizuti.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/04a2e080146b79adf1d2584dd0b6739e/tenixanukagufe.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/kodofizuxokakim.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/9426056763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+download+the+technic+launcherPDF 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_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 16872 bytes
SHA-256: 735cb8152830f83977abe2ab51d953f6e421c80e5c6e743665abfb84bbdfe8a9
font_01_sfnt_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 10476 bytes
SHA-256: 082f3e13fbe747d9920352f4652e2379c84350fa17a84648dfa08cffd99b974a
font_02_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1