Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca69049ba2ccb6af…

MALICIOUS

PDF

82.1 KB Created: 2021-09-20 12:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dc9c635d77e7f4da0cc8c6290e4f0132 SHA-1: 1cc15295f18d043d91a09fc6ebfd720305b8c1c0 SHA-256: ca69049ba2ccb6affbd935e47b9768a09365b7b7160112dda267ba344e630a9e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6ede11779eb494b9aa20ec54f038984e/tomixomozefimewujam.pdf In PDF document text
    • https://highrise.pl/file/55271382801.pdfIn PDF document text
    • http://meditopthailand.com/file/buxikafisegutipuxuxekonon.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/zelipev.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/sositibivulol.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/naforetizonivajuzape.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/53735377672.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/sekufigonixuzomoja.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/zolozotobiw.pdfIn PDF document text
    • http://balone.net/_upload/file///42280441425.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/vesojaxakuxeru.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/pavitatekulaz.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fafedd6886e904c4642477eb4b65163b/86462996993.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161324527d01e6---40317055671.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/bujil.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/zixuroti.pdfIn PDF document text
    • https://aneri12.eu/res/file/27382871419.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/94217155209.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/xobonewazesikuza.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613daa92b0b68---rakegaxanagokeji.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/fiwugigirujefodinenasu.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/74172764290.pdfIn PDF document text
    • http://xaydunganphubacninh.com/webroot/img/files/mobomiwapujemiwidoxuxude.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/90407963118.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/fugujebikutore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+unlock+motorola+phone+without+losing+dataPDF 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_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 17772 bytes
SHA-256: 3c68ad6354b953f8d9f80b1cadca1924b79e72a4f484badda61eb26b2dcf7c3e
font_01_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 11228 bytes
SHA-256: d9bb842159f0b8d7a4724463a22421f77a663cfa1cd33d04240f04c42cc052c6
font_02_sfnt_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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