Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9c52668437650e…

MALICIOUS

PDF

98.3 KB Created: 2021-08-08 01:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2914892e0ace6454abd651f86139a93e SHA-1: e6fe359e3947c43a148330c3cf8cc6f2f17b42be SHA-256: 6f9c52668437650ec9a2bbc1054cd578bdbd9d0141d738a929b0908014cdabab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of these links and the overall detection indicate the PDF is likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/tlsscamq5abhmqf9bqfcpri766/davakalawisixo.pdf In PDF document text
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/kuxurulo.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/jamizobojufomonalofadarew.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089223ded16c---10916343793.pdfIn PDF document text
    • https://birutelorasin.com/contents//files/77342031637.pdfIn PDF document text
    • http://kisito.com/userfiles/file/43067242692.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b98d3a0a3---22557237060.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/nidar.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf001da52c---75577496459.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ef5dcfdd3b457006494d78f469778137/91311066426.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v72ngnlg61rmn2pjj9r7oi8tv1/jafagil.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160707fd9bb694---zivomokefafekuvilos.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210621_A08B7534859D0EA3.pdfIn PDF document text
    • http://hylevel.net/Uploadfiles/files/nukofijawejepu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e6ac92e0---jureleside.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/33543755525.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/50090367225.pdfIn PDF document text
    • https://penal-garazh.ru/files/navizazovinesisos.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/sumezirokuxove.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8412aab27---73985074404.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/vubozezer.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/kunalog.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/249ebecab0b2ff0f1c61730010f33692/xeluvevewesa.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/sofexo.pdfIn PDF document text
    • https://penzion-palice.cz/content/jusom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+water+supply+and+sanitary+engineeringPDF 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_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 10844 bytes
SHA-256: bdc2cf48b2e9f70e6e9d4b08f514547692e4f998786b340da6d91891baf5bdef
font_02_sfnt_off00014a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A70 17552 bytes
SHA-256: 6546001c78701e92be0ad848bf3398cea42b8e375ac78710e643042b0ba0dba2