Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a0dd1c7ead004a…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 11:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a8416746691957b68205b6496126744 SHA-1: b5c3a98b0137746f0b92e6df9c64e0f1ff012fb9 SHA-256: c6a0dd1c7ead004af1e7c37a360441b0c99892cdd7e7bf67fc0bb6e4d5d2076c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm, with several URLs pointing to compromised CMS upload directories. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's primary function appears to be redirecting users to external sites, likely for malicious purposes such as phishing or 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://philabc.ru/uplcv?utm_term=kautilya+arthashastra+summary+pdf PDF link annotation
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607061287cd41---88758620824.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/11942162121.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d081e6580e---xizenikizomozorezub.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/be2153ea3a46487a0379a81aff4a5005/dikafavijisotuseg.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/06/15/30889191937.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/80656553486.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/daliboworuxotovubixobijal.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/jevofegagobekimijew.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/wimiwimeretudinepup.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/jimapogitabalodizugorasiz.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-25/20210825190052222808.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/kikipoku.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/soxizetujuviximo.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/jiu69egfdrqpqvoevsggfrpf15/21543500774.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/89543759138.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/xogezejibunekama.pdfIn PDF document text
    • http://caramelitos.sk/files/1856360454.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/72210052149.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0c94bfc6637a8b1c22fab6515ad61bb7/5473347521.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/repuviran.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/pajorofufoxe.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/6dq2bj67dnn6g6a0ljkf5dllkd/86377467397.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/zexagagixopurob.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_off0000e59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 10612 bytes
SHA-256: 851e64f7e1351854fc95a6ad61da51304d6cd1f4f15ac2c6f6cdf47d4ecafbb7
font_01_sfnt_off0000fdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD6 19392 bytes
SHA-256: 18a1268c362a791b66b8c8cf6b1a40c297babedb995361905fd8ce3452f2d1cb
font_02_sfnt_off0001307b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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