Malicious PDF — malware analysis report

Static analysis result for SHA-256 01190aba382ad045…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 03:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d5dd43dad5eb543bbc50a068c542df5b SHA-1: 393e076e66f8900187825782e41823d1db7a4074 SHA-256: 01190aba382ad045a39cc15e5c55e39b95b7d184ca14d6d07381def42de32676
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains external URIs and points to compromised CMS upload storage, suggesting it's designed to redirect users to malicious sites. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=autovelox+per+android+gratis PDF link annotation
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/q5v210v0jk834rdq8t425n2ls1/xateveropetoxi.pdfIn PDF document text
    • http://snft.ro/media/file/90576929738.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/52736759827.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/dogajedabi.pdfIn PDF document text
    • https://noventa.cz/media/files/file/47454392122.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/65378340056.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/pejobukiledoxidi.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/gebuvifudibu.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/78975059276.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/82688687364.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0ae6e325---losiker.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/36789258953.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/jofuvinipebelek.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/5455793562.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/2144310966.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/26420469477.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/lujidotemuke.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/fefatataro.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/68614868558.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c9a9cd1094f911ea7d1caef0ed0a1a37/96016416781.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/ginevonuvabep.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/sodozipape.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/fibopotupikuwuke.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/68438575046.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_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 18444 bytes
SHA-256: e00827bbfb177f920a60c46cbc516abf7e52b16e4bdfd4f1ce70e57f3a750307
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10816 bytes
SHA-256: 7b58eef1dfe3f1457fa239af43225554baab6ddd25ab31964b4089d533f1bb7d
font_02_sfnt_off00012008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12008 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1