Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a6e8b4c657536a…

MALICIOUS

PDF

86.3 KB Created: 2021-09-20 22:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f5f27bbb5e4f75a5d9afc425cec54e2 SHA-1: 57875ca26a1929f3155cc663d7e1fb92c310a7d1 SHA-256: 80a6e8b4c657536a07646a002c5b02b2f1f7e4ddfbe30e8b37cd14f4ae31ff73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7410e8352---perugamop.pdf In PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/88463644237.pdfIn PDF document text
    • http://www.pvvc.cz/files/nowebakapibinujubi.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/59376885223.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/gegenewegaxapumide.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/zugijizoli.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/36335468312.pdfIn PDF document text
    • https://istanajp.com/contents/files/ranalom.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/fodinuve.pdfIn PDF document text
    • http://vecsecity.info/editor_up/rafovenunebasefojejavoxa.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a44992a9355d4653fa89b3b84f745468/31237985858.pdfIn PDF document text
    • http://gibisch.com/files/files/gonelemaxidav.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/62053592225.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/josififitosoxulezum.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///rozetebafexatigi.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/76055785268.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/12324249349.pdfIn PDF document text
    • http://labotinnghia.com/img/files/sibewaxetutudafopobok.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/79119989374.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/zidef.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/21371545617.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/gufajopirulajelod.pdfIn PDF document text
    • http://video-cycling.de/files/file/60246640489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=parable+of+the+sower+octavia+pdfPDF 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_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 10904 bytes
SHA-256: 693996fb63f9548d7aea0279f9968295013f6d0592c07ec0aba22e6d1f12379c
font_02_sfnt_off00011ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 18284 bytes
SHA-256: 8e7da0764cab58a0667dc9690b1eca4ce3a081cd9e81f9ffc24bcc7a52c8386a

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