Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e67df601b6d6d86…

MALICIOUS

PDF

82.6 KB Created: 2021-09-11 00:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b06b0adc0c204ab52cc54ce8f5ecf902 SHA-1: f40657911a3443be30a6e6b4137b4f711f57bf8e SHA-256: 9e67df601b6d6d8691a284e452b2dcbbecb20c50ac74e0a3bc09d87b53049b44
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are associated with compromised CMS uploads or disposable hosting, indicating a likely intent to lure users to malicious destinations for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=genesis+old+grey+whistle+test PDF link annotation
    • http://novena99.com/uploads/files/202109060211254984.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/lanopomopiradapukelov.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/82208934164.pdfIn PDF document text
    • http://shopabrang.com/images/files/balunasalupoga.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631307916.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613485481b553---dajojik.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/zukov.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/xebarunefezodisetoziru.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/vetoduzapige.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/80677585434.pdfIn PDF document text
    • http://jcpingie.be/public/files/mopujikelitutoku.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/75554087946.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/87871088840.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/23c2866572f19fa75dde92c76308eff8/58327228341.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/50203893de3b15ff3e70fa69f0328989/sopobefumababobelene.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/pudurabadibaliraribuje.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a27e9b5138---96277297525.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/98633870574.pdfIn PDF document text
    • https://temahr.hr/files/14872616414.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613752f383c40---jelofuvazijafi.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/53290462555.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/vukonuzutibuno.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/wotokizopufaxig.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/9670650352.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/mexarovujixonafeze.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_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 10604 bytes
SHA-256: d50caa85b8a9819ca5338869a68f29e6da6bed7e3c8aa0c59d88b1bd2bc03f42
font_02_sfnt_off00010d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D70 18160 bytes
SHA-256: 573064105d0f2896f978d2e29ad44131c260dfffc33c78249ebe4c26d103531b

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