Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa1e44f2ab7026b…

MALICIOUS

PDF

89.2 KB Created: 2021-07-07 07:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 87989d48e7c05b7c36970a8113cbb332 SHA-1: 1596c9aada502f5e907e12768a18a21a43a505ef SHA-256: 1aa1e44f2ab7026bab5ffb18277bf048d40d9e9aa1139caa339c29ce046300f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute phishing content or further malware. No scripts were extracted, but the presence of multiple compromised CMS upload links points to a tactic of leveraging vulnerable web infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/4bbce1462f027096cd2326899468a81f/65557212695.pdf In PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e8d5de17515142ca4d50edc0c9df7bf0/dopevazofobimekorasuguwad.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/066492b3036b4f351c204cc67d70562d/27694029906.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17630f141---87979928492.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/c208a807d7a9964126a3027595cdff5b/33899450009.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/rf1spqp3ea2u4j5jnmk50rqhhh/18334429672.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/40cfa9bbaa7590f0e36507e599057c4b/ruwekejibuxabun.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/jiwawuz.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607daade25a3c---dorijalidelas.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9bc767c39---vefobifakudunavumiw.pdfIn PDF document text
    • https://miet.hu/kepek/tekasewa.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a116486562e---93252504060.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/vibibulajibakisalu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/b1dc3418913e98ac400c2e2659fbb5aa/71680029263.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a05f8062b9c---10310093831.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fa80021ac70178d2dbe143cb9a4bff56/42855220272.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/7184115888.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c19aab85b---24411263817.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/wibibepedopipuwadajofeka.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/60ec62a6330d876edc831fbb6ba45f60/bigozonov.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/vuzozeliba.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/127g0pcu6ilpoliv2q9cjfv612/jinuvejokobeda.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c878eeeb08---81059112478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=a+fortune+for+your+disasterPDF link annotation
    • 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_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 10496 bytes
SHA-256: f1e23452878c0869b164b6ac4b43c2f60b323e518bbf36df4230d41a570d18b8
font_01_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 17028 bytes
SHA-256: bab7adbbe03c7664d42ce2137d337f777dcbf73050b85e8c4493b773eb0bf9ae

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