Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0044fbe34889855…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 08:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eb2b12be822ac5aeb943b4abf47c8072 SHA-1: aa88466a916727911d7d2b4f71a28ff629322809 SHA-256: f0044fbe3488985535a7aec526a7d776cd41811b0e6b18c2fb32af71631f9a35
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest a phishing or malware distribution intent. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://pixomot.ru/uplcv?utm_term=suicide+squad+full+movie+telugu+download PDF link annotation
    • http://hairfibers24.com/upload/file/98332888575.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/7481166385.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/gagirelememijaradusujif.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/71270447026.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/19124862604.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/19270561808.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/61135102272.pdfIn PDF document text
    • https://music-group-store.com/upload/files/bavafulikinadalux.pdfIn PDF document text
    • https://dukupahit.com/contents/files/9193738086.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/lilimagiv.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/gopasedutusuw.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/7415f26a0cf56b13391bbb7b6aafba8b/rixafi.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/93185388380.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/205dddf2cc67797924f27395bcb3c767/15573800875.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cd1cbc408---71172878729.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/lejolaforiponibudax.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/71453816947.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/badumiboziwiwo.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210905/files/20210905214757.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/jamiku.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/pogofebazovejasujesabal.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/55341781466.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/98082336329.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8f0234db081e5bd3bdb8ec2ddf778228/56555978440.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_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 18340 bytes
SHA-256: 988d70857cf963be9c25a37d1474ad970e53b1e1b00c7cd9ba41a85d8ad17339
font_02_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 11192 bytes
SHA-256: 9d07fef63c3c3f672ad8226a60c95dbd51137afc8c68058172529f1bc0cdd38c