Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f196d28b2907af…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 18:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 360e31b70c8ec9a621d2fd95f0eedaae SHA-1: 5d64cae7eeb866a093753c6472b7879f2078d5b5 SHA-256: b6f196d28b2907afc32031e4d9e0b22de682cf6e9f273ba5bab6e91b7a7a9504
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=amazing+spiderman+game+android PDF link annotation
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/xokikem.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/95142545211.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/pozarazimu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/af42db0913388f5718b944e20f480144/wiromuvavejowopajezivi.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/81220480306.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc6a9398c9---fejanixekalokalex.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210910121915.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/nesogo.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/denemisefilazonunizinati.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/0a0ba012d88b0c052a14bb19766c5f5b/sidopena.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/17115486633.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/wetetu.pdfIn PDF document text
    • https://carlojans.com/cms/file/rupovulajirejiz.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/75066543189.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139535f3f1da---57346788175.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b05a5d0fb5---58272332047.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/sipemogogo.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/tivibodekejarigaparu.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/jabevi.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/regafefazosoxapafoburawa.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/76636713334.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/numogisikukomop.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7905d2250---61538375346.pdfIn PDF document text
    • 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_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 18348 bytes
SHA-256: 0266b61ada161c6f807d0de44aed4cec129e2a3e86d69bb0fe1cec1b55306eb5
font_01_sfnt_off00010bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF1 10632 bytes
SHA-256: 8ba851e0a603a5620032254ba6594184b5e5faaa544f798a597e276f8d29ee00
font_02_sfnt_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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