Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a621a1a760fd729…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 09:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aeef8f52d6f863c2c1d05856b54a08e2 SHA-1: 001075289b7c0257518e01b6917bf997cc56514b SHA-256: 2a621a1a760fd729b1bcdbf56d9500dfcc49ba8ef53e560d4d9c44c1626c1f62
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised CMS upload directories and disposable domains. This behavior is characteristic of a link farm designed to host phishing pages or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://indigobaby.eu/upload/files/35691456463.pdf In PDF document text
    • http://ddgasul.com/userfiles/file/18022630864.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/37134820215.pdfIn PDF document text
    • http://kaies.net/upfiles/210730011347711800iv2oxr.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/noxefaduxe.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160898adab9c61---3946364912.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/snm34038n1ilhe423gfqfjndrn/49178717432.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/70749988227.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113bb50de4c8---jukomepeduvabumuvid.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/mofexikalo.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/l7rec5camekk4dbtlk52dpfr1h/tafukagererabopedukovi.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/bixojizusogipata.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a51b5773f---nozozi.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/evci4a0n4ju6996af77gf4d3t5/gawubemexebebojiwusebuwa.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce23cdc610---totimakoduvizizutunokavug.pdfIn PDF document text
    • http://ciskmv.com/css/file/xegolawixexero.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/jatigibifakugonan.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/42797618324.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b455c5e301e---86039592698.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/29npnbb7b536duqtcj1behdtm7/jirukoxikekoribuzom.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/14707071127.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/11366556483.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/75671135108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ymate+download+appPDF 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 10260 bytes
SHA-256: f23afda6e25f468ec76dfb27013d282d16ea360f80d6499410f626baba5176ab
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 18052 bytes
SHA-256: 2ee83dd23e980e33b6f85f9579005be5256fb3131e3a5596005357a81872e57f
font_02_sfnt_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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