Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba8d2384d0a7569…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 11:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db13339148e310b6439623b16292bd6e SHA-1: d6e3e56114b5db138305b19b85099e24553e27fe SHA-256: 0ba8d2384d0a75692cb2e09d5326a05afbd67fc80e3412f22825b37b7cf0bce0
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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=how+to+make+snapchat+better+on+android+2020 PDF link annotation
    • http://thessalonikiflights.com/files/files/84021450840.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/29f265125850db85a935d06814287efb/zelatabid.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/mokesuvupadojisemibefej.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/debazotagades.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/45218436717.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/govudurad.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/72901033752.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210911014547817.pdfIn PDF document text
    • http://cutskytools.com/d/files/xivovagukikunexu.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/83033852821.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eeb426f7c5---91997450772.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/zebejutinuwamovunazovuka.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/7620846.pdfIn PDF document text
    • http://planetamama.ru/files/file/rafugewezofegikopave.pdfIn PDF document text
    • http://irths.com/upload_files/files/xemikige.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/60128129021.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1da397a2---loxanigero.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba8746806e---43673262764.pdfIn PDF document text
    • https://capecoralliving.com/media/file/xunatasepeg.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/89091854330.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/59744959060.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/visigubiginivoleduluji.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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11284 bytes
SHA-256: 1688dcd97f012edf4f1ffb71531480b68bdf66c14d0f740e30227cd38ba202ca
font_02_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 18532 bytes
SHA-256: bbc73b87aca620e4f41d9bd9c18a250e4242d930e2ca3501b9c378fa9f0181dd