Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe5642366a0f50f…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 06:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f69e97f9614ab32a470a19b6f6d7d247 SHA-1: d080f95da260a20d759f61708bdd530ee7ad93b7 SHA-256: efe5642366a0f50feb2431cd7c88aab5b500240116d44971710b633e063f7c68
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 lure users to potentially malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://medvor.ru/uplcv?utm_term=perry+gait+analysis+pdf PDF link annotation
    • https://eghamatyab.com/basefile/bainbookcom/files/38896134880.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/xedagazokudikagopera.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/tosugipur.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160847b6fc5c31---kojimafakagufovux.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fa5431366---denumu.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210619_02CE799F189E26E5.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/00odbomd4eh4vqtmd7elj5mbar/zopixedulivitu.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210803_CB6EFDF7E225FD67.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/pokasonirorovi.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/2coq6eps8jat4uo0ad6qjnacms/84176111661.pdfIn PDF document text
    • http://le383.com/uploads/files/80850831466.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c498e7a972a---gonufidifajosalunedisesan.pdfIn PDF document text
    • http://mp-journal.com/media/file/15427890628.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/sinafazifiwevu.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/51409455560.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f52587323---pigidoxowarujojemigip.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/70560794465.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6d0e922c7ed09202dab8df535b9eee0e/23876528312.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608323e1686cb---3440279139.pdfIn PDF document text
    • http://bankerz.in/qpic/files/33383352794.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2c8999694---farul.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c613e3c8045---kezivorofujozajuvujo.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/lugvghdr0ve2epct99g72c06v3/xotojawi.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/baxokasirodevujebigiboro.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 17008 bytes
SHA-256: 480cde527b7768eb7e26deebae3bb6b58a5fe55958b1e49cebd73c67e76a0e2b
font_02_sfnt_off0001307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307F 10668 bytes
SHA-256: 726286365189181ad7db1ae303a5dcb5f65c80951a62f0e50a2f87ed325614e4

Open this report in the interactive analyzer, or submit your own file for analysis.