Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89815d2f1617d0c…

MALICIOUS

PDF

102.9 KB Created: 2021-07-07 03:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fd3203b21a2a6d6715024df436704671 SHA-1: 057b429efcd4ad88cd05984995fb03f44ce4d909 SHA-256: a89815d2f1617d0c29347819457aa8652f1cc60ed105539b3b2f1965213fa5e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://cleanenergy.mn/uploads/files/78524443540.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f7332d9238db5e3c1df2ff01faa84701/91605276014.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/71029747699.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/jofajexujufoza.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/7332665162.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/a140b28069a58d50fb0a2cd1bc2c9169/24154807581.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/5e500ce0e220edcf9503656f03f4b3ab/govedogijetunarixigevixo.pdfIn PDF document text
    • https://isosklo.cz/uploads/fojodazigorulugorasu.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210619_7233AE3E9704DD0B.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e33400588---nejosijuxavununefabef.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/74115329700.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/rewepuwo.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/batimumirupabo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc1ec3b3ba---tixajuduxuzuzugemig.pdfIn PDF document text
    • http://bbgannualseminar.com/clients/6/60/607ac775fa755cf068047886b2bbe24d/File/98255526578.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/rilolovixipuxokagog.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/88362869718.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a962ae60d85---bezazubojetax.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/74249781667.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/75577029863.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/70531027496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=another+word+for+taken+awayPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001449c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1449C 18472 bytes
SHA-256: 716b8709aa241ef822223aa988712ad2ccaf0bc1cb1ba7549fedf32ad992c7ad
font_02_sfnt_off00017534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17534 10416 bytes
SHA-256: 35cada9bada3fe6e61547dcd2a9da23eda770a690ee8cc3fed17fee77a6b34f2

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