Malicious PDF — malware analysis report

Static analysis result for SHA-256 5effee9701f4ff31…

MALICIOUS

PDF

84.9 KB Created: 2021-09-13 20:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ca17c593f6240bf18b2f2bb2782371b0 SHA-1: d5b040ac2e88161ebf0ada15f034afb551e257ba SHA-256: 5effee9701f4ff3146a2a6f1a8d0af409e61e28b4a181099cacb3462a34b6022
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to unknown domains, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://rajakeempat.com/contents/files/felevanepunivit.pdf In PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/zazusiduzogeka.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/90418801013.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/vavajoboxutuxugiz.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/4577003926.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/6597150695.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/74601728555.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/fufajamelewunologiduk.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///10770444388.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/pijuso.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/bakifilememu.pdfIn PDF document text
    • http://pi-consulting.ch/download/28350422268.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/5603508309.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/zijemolaba.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/fuzoginosi.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/tonekitidoxu.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/fixilanitojafija.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210906214650886.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/7828796163.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/63188112081.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eebcbab2b4---45954277312.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9fe9c58c2---83288533497.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/zorimizejamoxedukuretowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=spyzie+hacking+appPDF 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_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 10464 bytes
SHA-256: b486532502c2a89804666d91339b434926b978dc0cae822586d6fa88f28e8a7a
font_01_sfnt_off0000fe21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11633 18144 bytes
SHA-256: 471781b5819498243874d4ecced6c276679b52a6afc658197c976d45ad5188fa