Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba02eba1ad57b88…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 01:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 89b32e2258e40036e2a3c3ea82f29635 SHA-1: f58c49916c4fe85511c68b2ddd0055abb07baaf8 SHA-256: 6ba02eba1ad57b88afdc87f840e7ac00538b6b22077c15eb14cb5e83f1b42b09
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://thuephotocopytaihanoi.com/upload/files/rajipulaxenobilegafonexad.pdf In PDF document text
    • https://trouver-une-ssii.com/img/pics/files/lokopufuda.pdfIn PDF document text
    • http://jogagongu.pl/userfiles/file/suxubifew.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2e4bc36fafd45fa030e48130dbe4925e/60588693640.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/dc137ab8eee2b7e6b9ce1fcffb38e098/83306969701.pdfIn PDF document text
    • https://austarpharma.com/upload/files/75174643908.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/90585345531.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/puruxogutusuzugugi.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/56981811975.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/41563034548.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/79530257318.pdfIn PDF document text
    • http://planbmedia.hu/files/17238327671.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/36441000511.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/puxiwexekupabed.pdfIn PDF document text
    • http://tlw.ro/UserFiles/file/63948040093.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b865b32293---wapetulekezet.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/74373532563.pdfIn PDF document text
    • https://akemi.ro/hirek/file/98240442999.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/64469810089.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/56548503772.pdfIn PDF document text
    • http://topp.pl/_topp/file/jeripelere.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a54d7511c---pixowebewivig.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/70114996535.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/28669916452.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/mobidudisisijuked.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+go+all+pokemon+hackPDF 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_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 10456 bytes
SHA-256: 823d8d408813cb37c3f7754874db17b7bdc90a746815262f9b908768d450a5aa
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 17404 bytes
SHA-256: ff9cdf029b144546441f24573d21516daa6395ba318da91b7336269d45ad1ba7
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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