Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07562104af7fd87…

MALICIOUS

PDF

86.4 KB Created: 2021-08-21 03:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 53210a2f29197b742def40d96671461e SHA-1: 8f8641170e8b438f8345c7ba31314772583d5fcd SHA-256: f07562104af7fd87dadb171cadc6fb7771227a3a0e6c9686d407bbe5cceda998
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=history+of+islam+in+urdu+pdf+books+free+download PDF link annotation
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/3a56c58e2c0dacad9ad64994a83deadb/64355351561.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/4c92f2cba211636e7cf3772bfcefd4b3.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/11db8859bbc7d26e9e05cefbd3c09713/50691352426.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/daboguwadabazezasupoxeko.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9f2cee840cec9138e772e48c47af6b78/7824322967.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/6671749561.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/fae913a6e92c736e1bbdae3c2db257b5/lirifavibosovekuporimoje.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/27497612727.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/fa961725c675c7c3bd65ae517f42e196/medufebominozizulomojisa.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/bopuzotapuki.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/0e75f938e914202c9895274b1827567a/girozomexewoxibiwegu.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/kekotuninexiketotorog.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/23e2ddcbd849e9b276aff0fad7b241db/91616541651.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bta7etonn5mmaf7jsju79g8uh5/rijepufotepe.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/gewubosemerekizovatoj.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/aa02d309e45e34f92d87a9146265999d/kosovifog.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/23989741238.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/31600815011.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/80e13d54abeeda49656c7bd17c171269/3257959841.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/f63b034e43db6d40cf0122f83ca7d686/63218157568.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8285990e---rupezabelovelij.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/xibuzadivisowixe.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/63853279186.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/xadaxiwarusiravib.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/33209801445.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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 11180 bytes
SHA-256: 3a5651eeb792b317873e09a3f5867f91fc6d798fce909fafacde07c93bd6da63
font_02_sfnt_off00011dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEE 17100 bytes
SHA-256: 0d1f84998ceb0af38e6d709504b3d6ec3f129acc914a1b3bd0b84ee4b1e4dd70