Malicious PDF — malware analysis report

Static analysis result for SHA-256 d502e8ab2fea9005…

MALICIOUS

PDF

90.4 KB Created: 2021-08-08 22:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93be9a686fcf482f4c783f88a4fa2227 SHA-1: 6ec1c28ec94d2bd499fa411218124d854ac2b28c SHA-256: d502e8ab2fea900581ca55437069aefea2a9e5338ca0ca7d7214065645b860f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute phishing content or malware. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/7hs9u3e73kfrmbcjg533p21913/fogim.pdf In PDF document text
    • http://mamnonlittlesun.com/upload/files/33862473032.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/63767647093.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/joralosedijobadipezos.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/80846773657.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/lulesanekumapagonagat.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eabc721e29---13473647205.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab71f28c7---16868722054.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1624530619.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/zadig.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/zekegosijapibudapixa.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/19/file/20210519_195602_188.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/ragiwevejakufubuzubesa.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dad185b14---sitatatamesabekatux.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc516c69ad---44673179418.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/28f7895ed6193c0eff17da67160bcb28/60726200213.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28961fff7---palipevuwelozorizinu.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/jk83hs12jlv53tdor6g0r3k7i0/25005017227.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/zusapivobukajubos.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/48389801709.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2815aba6ef---junonu.pdfIn PDF document text
    • http://clintonseniorhighclassof77.com/clients/e/ec/ec6cde7faca09d53f5ba1fe44cd32e38/File/rowifisov.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/giwetoges.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6bdeba90a---wofukamividineduduz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+turn+on+hamilton+beach+microwavePDF 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_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 17608 bytes
SHA-256: bbf075cbc7f641c0418940e3f1db69594e93b205d1288d4de58b89d00cea1165
font_01_sfnt_off00012902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12902 10712 bytes
SHA-256: c25e914c42417f39528f62c1dcc6c5cbb8fee3ccd353e7a660401860bcbdc01e
font_02_sfnt_off00014162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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