Malicious PDF — malware analysis report

Static analysis result for SHA-256 0119d9ef8bb93a6c…

MALICIOUS

PDF

82.6 KB Created: 2021-08-18 11:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de9df16151b6a9ddcaaadae6062e18ff SHA-1: 6a8723a6c2811bc770e596fede05d66675970b7a SHA-256: 0119d9ef8bb93a6c128671efc7ca139e07b20bff76070024996014cbbfb95737
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 uploads and disposable hosting domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers have identified this PDF as malicious, specifically a phishing trojan. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/a77s0fc13n6f2jrniacu44sp2e/65395018773.pdf In PDF document text
    • http://lbtech.kr/upfile/files/vesamakarovazovizituno.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a325515d9---40004786158.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021060410442480554.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/libimowemibiba.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/buparujonopewawogalemozi.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/19047084273.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/58390920295.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/49985315829.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/waborifofivebivurubabafe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jiiqnrki2f53nodjo13jnduqnc/51635642896.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/tosadelufagelubefefuwi.pdfIn PDF document text
    • http://seamacros.com/upload/file/73791465100.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e77161f4544f512f673701b06cfbb4d7/loseduduzewutakikivuganor.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/82727399466.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e65e7a57c591881adf9ad5b8cb05f8b1/27894271412.pdfIn PDF document text
    • http://chinalabware.es/d/files/zotiduf.pdfIn PDF document text
    • https://aneri12.eu/res/file/22682598114.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a77041815---xejujavuji.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c653ba9f61b---51802188531.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/10483609749.pdfIn PDF document text
    • https://ijp2.com/contents//files/34335871903.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc27e95fff8---30416159947.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/de2f6d18fa2a0df902ab6890de285ec3/89788356345.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9926a4ebc---wafagululizeratu.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/am8jn2l8e9fkohm6thb9cr0op6/83108575978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=aufbau+principle+diagram+pdfPDF 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_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 10796 bytes
SHA-256: ffa6d822ff448390d62615301f59c72cff658f75a133d0d6289dbd7cebea5524
font_02_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 17120 bytes
SHA-256: e80d41e111079d615a5c87d3307b09b9cdab0b5052e13630620cf7160cce497a