Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f297895f7671ce…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 13:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de48a75aef96e6568cf6c2765495f681 SHA-1: cecfc250c2c9d7807c42569e13366eb6543cc4e8 SHA-256: e1f297895f7671ce0823cc9a4695bacaa62165896a7e4583a7392c5c35460e7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lawrenceyezersky.com/userfiles/file/41822079953.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/i2ts4mhj7m9td1d7ica6qdk4ee/37215435117.pdf
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/bolexejunes.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/qde4ul1t89jtrjm0b7flcsq2s1/dakubal.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e94b37b01e6---25778581952.pdf
    • http://cioccolatogallucci.it/userfiles/file/pupefidowug.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/28068572830.pdf
    • https://bawwabatrizq.com/userfiles/file/10793298931.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b14ba9ef8af---pizogasekixiwozopamobak.pdf
    • http://bbdecontra.com/userfiles/files/sefusumiroxi.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ff78cf22c33fa60d18ace307f5908fab/96115041417.pdf
    • http://www.celso.org/download/buwinuxatu.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf376cdde0---ladalo.pdf
    • http://studiopetrilli.it/userfiles/files/46900970297.pdf
    • https://ecotranslation.ca/upload/editor/file/woriruvulili.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/rinimuzuxonizote.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612599a8268df---48859201098.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160814697dded5---16663939355.pdf
    • http://amctop.com/board_data/editor_img/file/202106040648.pdf
    • http://globalbando.com/DATA/upload/files/202108170654304760.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161160df622334---fadajap.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c525511e9d0c80422200107096500e6/62975390641.pdf
    • https://denizlihorozu.com/resimler/files/satotiwubuvapizovizider.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hitachi+40+inch+smart+tv+manual
    • 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_off0000d6f1.bin
37e1d1647c086abe4b9a3d8d575180fbb4315aee70876107797844a3d3228222
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F1 18040 bytes
font_01_sfnt_off00010617.bin
e074c081db380b8f4ff0eb947e5c86a861448b58c39947a99361cef3471b496d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 10600 bytes
font_02_sfnt_off00011e21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E21 16792 bytes