Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee069dc11bbe17ea…

MALICIOUS

PDF

89.8 KB Created: 2021-07-29 21:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1ecf041911cb8bd6a2b4a24b290bb382 SHA-1: 77a04d507110808281033ae474374b1a1e52b90d SHA-256: ee069dc11bbe17eae2fb911dc275c17e52528c78b842cf8c81bb4e7be77e87b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://philabc.ru/uplcv?utm_term=exemple+etude+de+march%C3%A9 PDF link annotation
    • https://virker-ikke.dk/files/66373840982.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/117fc68915358af03a63e4bd12ad7e99/42307978615.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/6836ebb905aa9dbc2b0774dc57cf393a/97270263857.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/27926337799.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c03082aaf1f---guzidolebot.pdfIn PDF document text
    • http://apple888.vn/luutru/files/41864839488.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/torelexigapesi.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/bed0f70a38c5b34c66efccfcd27d5f37/44896614875.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd91de464f0---vezipojuralaziv.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/16061277930.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/95311619974.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210726030731.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/508ee4bf896352bf4d1c06267ca2a512/67580669286.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/a7085964d9caaeb83a21b67fafd15073/26718364401.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mevmc78rrunqn6150cuosbcj42/12835233223.pdfIn PDF document text
    • http://tyextractor.com/d/files/8568858037.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0bb3a31365186ab170ba49748413f578/9002368938.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/bitimakudowadibedutujiver.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/30743775239.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/sukevuj.pdfIn PDF document text
    • https://mfdesign.hu/files/file/58347235540.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a2b98a52578aaadcbaf18fe16d9ef655/gesopomexur.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_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 10636 bytes
SHA-256: ba77edd3398d4a09ed23a3d84beace10633fad017b48b096dda1415741143f0c
font_01_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 18748 bytes
SHA-256: 33c4f6a0c30580e9db3d9234623306c299ca9a82a08663dfa726269a44a64a47
font_02_sfnt_off00013f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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