Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e010ed4c2b59dd…

MALICIOUS

PDF

86.2 KB Created: 2021-07-16 14:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 95aac6eb345199e812ea78f01bea4d1d SHA-1: 18a19ded31e249457b6e2e1a520a2b048133642a SHA-256: 85e010ed4c2b59dd889c4ef4cefda20a5fc26a9f056823590f563de3fd1f03ec
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://fertilityupdates.com/userfiles/files/zolemigaxonogizegewegef.pdf In PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/ace4b1d5a9eb0ad3d14dbc986258dc3b/valopetusumuxisitogagomi.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/5bf3be22a3daf4f512e68ff510073d0c/17736835089.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744a7333554---luvazi.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85100af304b4e410de924db95ffbc128/7098392807.pdfIn PDF document text
    • http://mutitar.com/user_img/files/80640195901.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d95ef6a3849---wawotasum.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/8805093836.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/73444361302.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51e9e17d51---gobakupubopotugiganop.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e544e4bc37f---lovise.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0c8598df5368e7c9325dc5c6dd058144/zamek.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c9653f5e6c5---21668809046.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/8ad44499db2b1cd63386c2ee579714fc/jovofuvaxexupodojaxol.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebbcb6b81b---pituturupobexoj.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/d8fd6qq9tpdkp6nr33m8l80ee2/10405233244.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fa418dbb3---10093429601.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/supimisewufamitu.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/27935898222.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ba60a6ca---tawazoxalaj.pdfIn PDF document text
    • http://www.celso.org/download/zaxikuzalutiwobatubuv.pdfIn PDF document text
    • http://texmet.pl/userimages/file/dekegadet.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5da08f90a88651585f81a90e2cbb06db/pefobokufaxofajawiza.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/19235162240.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/99602343960dc29fe46174.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/36658069071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=force+majeure+definition+black%27s+law+dictionaryPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2d3291fecb453666903fc4f2e310edbd/10036517566.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_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001041e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 17000 bytes
SHA-256: 90dc71db80f48aad25be6a67159cb343944f2e86de18e87b5d184d464bea7e2f
font_02_sfnt_off0001306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306A 11308 bytes
SHA-256: 49f1109945c19447e9dfd5cf8c7d6a5cb7965ba99df024b624a0124c74dbbf1e

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