Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e70d6970cf300d3…

MALICIOUS

PDF

143.4 KB Created: 2021-07-02 06:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: de9bf4ee39a03b1f06ceba33f2bf170b SHA-1: 594f6c754b6d10027a5f22f7a98b618d48958ed1 SHA-256: 1e70d6970cf300d3c14b0d83a904fddc5ca1b066e636347cdc31d6dfddc7f7e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly suggest the primary function is to act as a lure to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://philabc.ru/uplcv?utm_term=william+shakespeare+old+english PDF link annotation
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f8d224c3---78150260643.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084e8359daeb---gowalawe.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a1d94a7f7e3ca0700fec360e0eb7f0f6/85136039337.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/0kb26kdrq6t7du58jl8kgojrp3/razisej.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/44934193512.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/22918768340.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/52266730391.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b388beb5a---37633714387.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073957d0ed03---75253043846.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/92020001135.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d0cd9411df3153683432e73cf3e1c49c/nobesinekukefufolisen.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d23b1fcd312fcc21ab38d0b58768507f/17258151079.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba628e63ec5---39958680711.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/83a4a4613ba73ddda7774b58a661015f/lavemositasujugopewiz.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/0791e166ec2865163234ddc33f0a25bd/bokipawavapiwisaforidabe.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/vekavivadosowozoluvukame.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/rinutuxu.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/0f0ac71941b1a5898c7f3c87b07b2aff/71773587048.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd04a1c1e---12087845845.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/figew.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/jirewenix.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/65e37de36fd38f7a3ecd204d5f2066d3/mabofi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a83668eb7---peboxelatogimamoz.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_off0001d188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D188 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E99A 17880 bytes
SHA-256: 28131655d4f92bebbfefa49ebab5a89f27ddd4c8e947276708a64c01be9e1521
font_02_sfnt_off0002178b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2178B 10824 bytes
SHA-256: 2f7825d53695e448cafced1b2c512ba2f18896720dca0c42d6171f8109f62efa

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