Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cce111aba042f5c…

MALICIOUS

PDF

94.6 KB Created: 2021-06-27 16:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9d2b0dc22cc0188f3b96bd0019a70acb SHA-1: 7e3f7a924aaa4fdda21cddcb389f11e8e970c95e SHA-256: 8cce111aba042f5c74707e3dfd813d646e50435a2d31ae0f2a13f34adda17a37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://alt-1c.ru/userfiles/file/madebim.pdf In PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/vumuriw.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/dcrpk1nfbre4trgau291hhmqe6/34368008021.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/3863e2544a960eb8ef3a80422af42e7d/82014401179.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/biwasinud.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/wixuxedalipi.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/dagibexoxulorupupalipuri.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/rozetawema.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dc66d9e03---21045608026.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/82246475848.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608620fde4d1f---15089023150.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16087c1e485a43---dekufev.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8972e519f4---54347024114.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57f66f8b4---26150718920.pdfIn PDF document text
    • https://fivetc.net/uploads/files/58767878541.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d142c37e93---51170460616.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/cdb4c89f3864499c2fec5e966f84cb22/wuvixakabarugimuxeso.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3fa898a0eef089e246f7ac302c6f7591/nulamagomunanalosedugew.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/jejebalajasix.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/25668976003.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72220f4ed---wiwonumukepimufunoja.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/10gk8rvq178m6vdsiqqb1o4uc0/96503281213.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88068f79e---82789173716.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///risojosawirulozogipise.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/15796978840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=legend+of+dragon+pearlPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 17728 bytes
SHA-256: 48c1c888a70ec0f151ba047746e42fddd1c6709ddd4290bcf852d400dad8c527
font_02_sfnt_off000132dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DD 10272 bytes
SHA-256: 0e2b3899307b7dea495c434f6f6c3a3326090134da2140ee37714784974d152f
font_03_sfnt_off000149c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149C9 10500 bytes
SHA-256: 271246a373e03c1fab15bf77a9fbf9871c082a0d811d9c48aee1020a2ac61a44

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