Malicious PDF — malware analysis report

Static analysis result for SHA-256 765d92844091c34a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-08 01:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e74150ac017cca766148eb1567e965dd SHA-1: 29e63d2f2b218f4d9552b5cbde6c78ac56583514 SHA-256: 765d92844091c34ad06073a35664bdbe4010746d6d2d3605c00b0478136452bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The presence of external URIs and link farm heuristics suggests the primary goal is to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pixomot.ru/uplcv?utm_term=hindu+baby+boy+names+in+tamil+pdf PDF link annotation
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161135a1d21469---88309679863.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/febogamomakipa.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/viwumajurijuveza.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/bopitazituvutepenu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe557b3aae3---gojokakutib.pdfIn PDF document text
    • http://baoveantam.info/upload/files/47762927207.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/xajemaga.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/takukawenamifo.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/rilop.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3432889a6---62654796600.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/faketokoxiw.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb3447c78---resipawetulumobowag.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df70a9e96df---tifatobupesox.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb6eff098b---tegiwedoko.pdfIn PDF document text
    • http://capital96.com/userfiles/file/japatadurezudujuto.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/67380761266.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/12757192025.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/38803547171.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210525105632.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/tekadiraveb.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/26748299867.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a0420d5f972---37655741599.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_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 17524 bytes
SHA-256: 1f630add65f56fe173f535e33eb3ed76544c81425b9ef106968921685368844f
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D9 10904 bytes
SHA-256: e395e498601cdd15af3ba39e542b3d98efc79446fbee4a1c0d183a28b24116fe

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