Malicious PDF — malware analysis report

Static analysis result for SHA-256 8783920e826a231d…

MALICIOUS

PDF

86.6 KB Created: 2021-07-31 03:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 97a6cffe0efe36d5c16c1c292569016e SHA-1: cd6e3203476abea2aabda09ae2d19a156e7aade3 SHA-256: 8783920e826a231d1da68e732aa0a1da6a97078622c3ccdb8ce79afe870b1b81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting sites. These factors, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggest a malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sofia-es.tokyo/yamituki-n/uploads/files/18788612123.pdf In PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160773b72cb626---wopodawejebazomuru.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/80f77agjt897gv3oc4ve6btsc5/wuziliwobizatixenewow.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/27630529371.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5e9eedf39e1614cc919b0086cb512418/66893618175.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/10891133369.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320f19fafd---muxixitinamujot.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c979ab7a8dc---lotidisisuremogagepuzame.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/vi8oqrfjmsjnpsqqbeverad0p6/texewumokorejibiti.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/mupetufupul.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ff5876da7d347fe3900e6c435cf27e81/1861349592.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9fc643c46---62235272447.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee766fab30c---81863813794.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4aad60719b---26136924387.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/ea06b9eb184b13f45d5161125d002565/99864075416.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/rojuwa.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/12833166174.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/91900310824.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/34693517768.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/lebafumobi.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaf744539c---labilogat.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/pizegisof.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/zepir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+calculate+turning+radius+of+truck+and+trailerPDF 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_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 10920 bytes
SHA-256: f7fc22609dad62b79ce3664e3caa42b9343aaf1e6fc01a9f22b55a8a40922029
font_02_sfnt_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 16980 bytes
SHA-256: bc64af3ee292b63eba6eaaf5adaf0daecc365f9e787e421971c12c90a4d87cab

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