Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d8c3f464766ed1…

MALICIOUS

PDF

83.9 KB Created: 2021-07-20 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24fc59cf062a0c36943699848d0d381b SHA-1: f7e26eb921b6cd8942c124caeafa333b91591dc9 SHA-256: 06d8c3f464766ed17c552507cd317fd4a67f208f4da39b0748e151966830bb03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c792f9ff---68809709709.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/f936fac1a98d83a6824d221b453fd689/bedawovagowurojamevad.pdf
    • http://verkaufs-akademie.com/userfiles/file/ladajesirubobanikumu.pdf
    • http://banquat.com/userfiles/files/misus.pdf
    • http://webbuilders.com/files/file/53990491156.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e8c0c80d0---82430761633.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/sugojobukatito.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/jegurusenok.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/m55i5v45v0038vq17tkprdq07l/nebevizefotizuxofawi.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2uolnmf20n003hi0epru60lscr/875872998.pdf
    • https://debcopharma.com/userfiles/file/widemuluwu.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cb2eaf662---luviwikivupuxakef.pdf
    • http://www.allatpatikapecs.hu/images/file/40727057277.pdf
    • http://bellina.pl/userfiles/file/doxofodozikojutodi.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/qcde8ql07t8lqcaufrrrpdeiui/fowuwonujuwavebiruwuxexuj.pdf
    • https://iltuosarto.com/file/gubavefofawefikabo.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9d6a64ce3---91308309179.pdf
    • https://arab-hams.com/Ups/files/solesiwisobolile.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/84fa39f04090b69164665dd04c26dbc0/7886497700.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a85ea415c0701b4668f0ff32c684030c/13114708537.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4458a8d0428c23429fd5698acfe1878/40961852626.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kn1vj5p9vm45ttrdfsb8mq50pt/8115218987.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/fisasak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=white+cockatoo+for+sale+near+me
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30d.bin
411eed6e7d00e53d7c069b33ff9c4f0b3eb34a7af904e1d8e91da4f9da69ea22
pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 10684 bytes
font_01_sfnt_off0000fb63.bin
1c5f5cad4da4587f77ceab7485690d8d1e0e51d36101c3372f228e90942483fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 18168 bytes
font_02_sfnt_off00012a60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A60 16792 bytes