Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9a5448789e7c36…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 23:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 579d10e52a936775f58dd483c0d79a4a SHA-1: 595698715e9a55263ac1356eec3415a8e5c94d4f SHA-256: 3d9a5448789e7c36166994503d8b460df26a0572972e6d6b8a95969c0fd6db20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, forming a link farm. One URL, 'https://pixomot.ru/uplcv?utm_term=rich+dad%27s+increase+your+financial+iq+free+pdf+download', suggests a lure related to financial IQ, likely a phishing attempt to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://pixomot.ru/uplcv?utm_term=rich+dad%27s+increase+your+financial+iq+free+pdf+download PDF link annotation
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba4d76d4aa---75215403509.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610f92b622517---jibenideviroluruvin.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9147f89ad199296287a86dddb01b7b39/zojig.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/2209741837.pdfIn PDF document text
    • https://etimes.mn/uploads/files/78079288802.pdfIn PDF document text
    • http://methese.com/upload/files/63591315608.pdfIn PDF document text
    • http://e-district.org/userfiles/file/ruwevaduluzuxakozerane.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/44vlp51v9r8lmnrvvvvj6u3da3/fimokobedu.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/6d9ec181e2247a1e56f436c02b2a4bf9/45180936494.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9e4c411ff---roxujefurutu.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/jimlvpnp5tbndl23ug044h85ru/bodafunosevidoliguzixum.pdfIn PDF document text
    • http://inse.us/uploads/images//files/togurewepusiwukeg.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/hfgic4e56u8ehm1nk3bgq1oai1/luzipogiwutuzuponop.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/dikdcvudc6gfh39cmel5nmahh2/27462702441.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xesasogofapisaburupimo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/43249cd10950f54ba033fca3d8f5b568/15587498125.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/86bbaca1cf416fe3644ee15962fb883e/lofopesobuxilazujejewop.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/666a78e5c532192a92a38485c846cde0/bolelop.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/voxodibaduz.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/pipivoruz.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161072994a62d4---zotezula.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/pibozali.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fab7d3f2d---zonukedivizu.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0d721cac5---semexesepanifoxonafikud.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_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 11144 bytes
SHA-256: 3ed73b69b8afee7f2c574ab7023712709de59f352b4ac296c380c6961b6c0314
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F07 18208 bytes
SHA-256: 3b56d109c7cd268afef68466fa148106f8cac9cc2da05d556550bc1554043e80