Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab908c6af4ebf1c…

MALICIOUS

PDF

72.9 KB Created: 2021-08-10 15:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 980948eae35d99611523f7c4d47fe1e5 SHA-1: bea0f8cf2ba517b8da055251b405efaa88c0a132 SHA-256: fab908c6af4ebf1c3495201785b3a0298a04966ce7e8b09036a80a30c632d686
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 websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://apsco.ly/userfiles/files/kenofonoradiximuvitezukak.pdf In PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/dosijere.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/fujunoxiwikazefurogu.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/34582263554.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090760ed767b---8398540033.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/7b4e7998c0bd709b30f1772c84ae2e43/85946093736.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210607_B175DC4AD38BB566.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e31daed84ab---5475344600.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/83800327323.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021073100242373499.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/84359830887.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/e4rpstjl59bevl5bqk602mh0sr/bapisodudopisarekasajiwa.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/kabikuxol.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2df772553---butozegejewigazi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/dd9119605eaf050c16dd07797722fd73/sazejutobikepabijebi.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c77c5b52---58904542609.pdfIn PDF document text
    • http://lyshiying.com/d/files/93290236028.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/manaripadanudadimajira.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/g177g53k2jgrlauvkt2ksdqhj2/xomovofitoni.pdfIn PDF document text
    • https://atlantidegattico.it/file/14898694003.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/12962274006.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/remaxisuxuwiragugobemer.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/jedet.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/03da63776077762565476cef807a8869/xeseze.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/44645521807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=escala+apgar+familiar+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_off0000bc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3D 10492 bytes
SHA-256: 96b85b56b9737a3a33c0eb8ae1b63cf40501db41b400f49dbc7f3c171b13e87f
font_01_sfnt_off0000d3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 16388 bytes
SHA-256: 5794b651f1bb94ecba01da408f70d5eb710342cefd501df7e4f23316043f9840