Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01edf875ed99f0f…

MALICIOUS

PDF

100.9 KB Created: 2021-06-25 20:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 292ea59c260c229ecd5c981d23a063ed SHA-1: 103163f77b6124cbd69d5e961ea72d0f61bb4b9f SHA-256: b01edf875ed99f0f0208af32859d350ceabe02097313749bff0885d0cf75688d
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://topinsolventa.ro/userfiles/file/kaposasuvanakuzulu.pdf
    • http://binhchuachay.info/Images_upload/files/lidawaretokalisemeko.pdf
    • https://najlepsze-w-polsce.pl/uploads/jitijagul.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8932eb3e---80584964568.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/3502883568.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/59664768537.pdf
    • http://liebherr-tr.com/userfiles/file/17170719275.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/82rqo3ljnt2jk7bakn4bka8us5/1313693913.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/34f814cbbcff62aad10cdb4460b7d7f0/15791050182.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/pubivavuzizakipusojusebam.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/77904d72edbad3dc8063a6329b49f455/tosovoxomorugetuzipupej.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a993b6cdfc---zizonumurizukalozosarepi.pdf
    • https://weeb.nu/userfiles/file/ketunaluzuziko.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec206440bc---purixavugekof.pdf
    • https://armagedonspedycja.pl/files/file/nizufejo.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072748086129---pubolejew.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afea3900cea---64196841009.pdf
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210609_2E31E3A7A11B6EE3.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2bf758f2ff2fcf87524972e619d59f98/2525327529.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//lunapil.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad4553c27---pijem.pdf
    • https://angkaganjil.com/contents//files/zazujowuwul.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b020a5cba51---76911503791.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ddc31ef7d---34480590925.pdf
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/26025779813.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/8323679184a1e4163f817abbedde11d6/bebedonarapotegarun.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e14155d93---84420510800.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=differentiation+competitive+strategy
    • 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_off000126bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 16792 bytes
font_01_sfnt_off00013ecf.bin
a4ee63547640bf1223490a01d891144edfc57e8468cdd6965c7491f3b97bede1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECF 17400 bytes
font_02_sfnt_off00016c75.bin
f1e4633a38398d2f259e70ee7cc17345f95baa001fc640d9318244732b42b4c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C75 10960 bytes