Malicious PDF — malware analysis report

Static analysis result for SHA-256 795f7ea69796310b…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 06:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 399aa58a413a09c864ba2bdad28741db SHA-1: 45ec8fa9127fc8a4bb1fdf0959e474cda8c745f4 SHA-256: 795f7ea69796310b48fddcae0e1922bcd225083c7ce02e807ff39c701bfe3bdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

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://ahlhy.com/uploads/file/141929369423.pdf In PDF document text
    • http://asfalon.com/__files/file/komejoxavezatugiferobuv.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/65929686603.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/vogobenavakufabedepitoj.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/b8ae382a6f8a2e19e7b3a212a31cc946/rusopijuwelotigigo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fccf4871ba---99153059653.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57df650d2b---pipililosopo.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/34634748256.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/bc3064da07b5d62756c661dce670ea2c/fopib.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6b05ca1797520c0919968bd55b302da3/93529259869.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703adf34e1d---fupibukofojuxu.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j9qj09v3tkk6i7iq206pqqfc5c/72632541768.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/m65l74nopj9o776298cs4c6cn3/fipuvedibusunetofi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ac461f672---bufaxamatibekuvarumikupu.pdfIn PDF document text
    • http://planbmedia.hufiles/mapanudolamizusefu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/crc1vur1e745o4vvnn4kffub17/48009637975.pdfIn PDF document text
    • http://crediramasrl.it/public/file/4989611048.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/kafime.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b463a2f01e0---ferotarakasipevuwor.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/81191915797.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bad6cd3b66aab4d0e6a3e81165178065/ravodunufegowukoruvikuk.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44922d724---50950452790.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/oaehg53jgvtual8bujs9fmfgt0/zapik.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/31268509225.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/dan7f91dg2b7o806bp9u4lrsdp/kikerixudixuluxi.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/74dd93cc37816c0fd0851213ac53480b/37845834784.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/junepotapoxilagotas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=interest+on+personal+loans+tax+deductiblePDF 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_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 17120 bytes
SHA-256: 260d7c3f13e16eb93fb25a26e6ca337bef1abafec847e2ba118806ff3827da4d
font_01_sfnt_off000118e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E8 10800 bytes
SHA-256: 92e4ccb3db0c0837d1ce3efb9eeec84fd1c7ab9dc2cc290867fad6bf483d27f3
font_02_sfnt_off000131b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1