Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d4f0cf8a2ef70c…

MALICIOUS

PDF

70.5 KB Created: 2021-09-07 15:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 06a3c562e0bbf371626042ecc555b559 SHA-1: 4bc50215d86025d9bd6d33d1e366ceee8856e80b SHA-256: 04d4f0cf8a2ef70c135958eef5597ba72f151174a35cabbdbe8bd40da1411983
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external links, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish for information. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://archism.ru/uplcv?utm_term=chess+strategy+beginners+pdf PDF link annotation
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ues2pdvhl594kesoars9ej5lm1/68153199377.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/padulofabuse.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2f31f194---22457059497.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/44452406857.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd16ada88---63387695871.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/dugazib.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c3b6cbb6c---jevebewujijujopex.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/458777668.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kpdj2a4ab0cnghr5ihnbh6cd16/guzixapep.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5b1aacb9---revit.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/323ce521a7b851dfa3e20d1f48166520/tumilom.pdfIn PDF document text
    • http://newcastlehigh1967-50threunion.com/clients/43248/File/mimelarufedipiwojaji.pdfIn PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/wokizegawitosadulapid.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/vozejuvugiwefo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160efda5099890---64328642744.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0ed771b2---14473213400.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cbe687d07---bizojanalipajajasif.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/tewiwudaganovaxud.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/6470268828.pdfIn PDF document text
    • http://jngf.cn/files/file/63515429106.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948eb101c37---52056165722.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/o3od1286kej3g82tr4c6ai39p1/40689356628.pdfIn PDF document text
    • https://securitydm.com/slicice/file/jusivalaf.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_off0000b679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 14792 bytes
SHA-256: bbe7ca55e1bcbe2e5554e6b054de5dd4ed8248c6290cb153c511f6562636d787
font_02_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10896 bytes
SHA-256: baba2ad16f99145a6335a91a37d038216acda524b89df33e4b689d20be49797e

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