Malicious PDF — malware analysis report

Static analysis result for SHA-256 f707e394f5d01656…

MALICIOUS

PDF

86.5 KB Created: 2021-09-08 09:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f62f6ea0fa5f82dd3e5228eb6324113a SHA-1: 4b0b4631cc2502a74c914112f8b7c0133a78cb2d SHA-256: f707e394f5d01656e4757719bccd2d0a973fbbbc28b43f5ba4aa3a34cc8510fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation or to distribute malicious content. The presence of external URIs and link farms suggests the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://allytemp.ru/uplcv?utm_term=embedding+malicious+code+in+pdf PDF link annotation
    • http://artin-intranet.com/ckupload/files/93895375801.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/povalabolaxud.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/2ugqqi9ngfqsuv45u36344ar8q/lowidesegubudiwerojebu.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/mokale.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/zowefiritigofasekefutimep.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/pezuwezevavosikupurikun.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/73107936178.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/49427284574.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608de32724aea---wokedubenajuvijutuk.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/webebatux.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f6116139---32311915815.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/ravomerapa.pdfIn PDF document text
    • http://nkland.org/userfiles/files/51901614714.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d83a5cc79---80766775193.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cfcdcf2b31---10852496051.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/18558670341.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/30641499998.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/dogumediwofetekimafupuf.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/riwusujujulonubitonaguw.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/gevajiwimozonebabuzekani.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/be36b5b7fda4ad2cec3ede3851efde58/xipujaxupe.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/59748377931.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/goperedutotafowowagexoji.pdfIn PDF document text
    • https://windsbs.biz/files/file/72595746638.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/748595bf8594db10fa9532ecdba3a74a/28226463124.pdfIn PDF document text
    • https://petala.gr/userfiles/file/vorov.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e52f73cc060d9c1f19cc4ec49c56b01d/98319455214.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_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 10988 bytes
SHA-256: cc64f66635020e10e8efc7496c7aac06d6d5c81b2d858d9ff8b4d17dc65c6f27
font_01_sfnt_off000103c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C8 18740 bytes
SHA-256: 52206d2e87f5f30199674fb2faad3eb2858cedbaabb8e68f082e686de954153c
font_02_sfnt_off000133cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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