Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d887c42a68278c…

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 13:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89fd038ed1ec5bf032eb2fb574f67de1 SHA-1: e6c260dd527ff14bfa6ff4de5e56fa74fe029224 SHA-256: 04d887c42a68278c36da256c08f4d14c1d47c6b532b84465635b48774e4e7998
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URIs pointing to compromised WordPress sites and potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URI patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=minecraft+windows+10+edition+apk+download+pc PDF link annotation
    • https://alpinashop.bg/files/9024699566.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/77361641476.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/pgv07imv272old9tl7jnu2mhi0/52022828464.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/15105141681.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16130e846601d6---69355412197.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/relubofamubovaketi.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/jafomugeworaxebukazepox.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/ganas.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/69069080434.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/fitid.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/96099120735.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/maxakalonon.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ffe68f111---rosuwel.pdfPDF link annotation
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ecf30b43a---40576508828.pdfIn PDF document text
    • http://gr-chem.com/upload/files/72693041661.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/xuriga.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/mimobagadanedu.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/76512031643.pdfIn PDF document text
    • https://campermagazine.tv/public/file/53516787611.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/2b5e46ac68fbfb02627d94d9e8f632e0/matemazawoxadolasazojez.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/gemet.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/wegutotiwaf.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8af13ead7---nozobubo.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/sinudowex.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_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 10960 bytes
SHA-256: cc7f2bf2901efa19c04317f063924efc1245c2cf53f9511252442361bc3a03e1
font_01_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 17784 bytes
SHA-256: 7e91cb5fdf25628369b71638866d052c6fc616c3079bc26fd39e87b1678dc753
font_02_sfnt_off00012417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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