Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3becfeca9c1c0b…

MALICIOUS

PDF

103.2 KB Created: 2021-07-01 23:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e5ff14f7a85275bb61db7fb586316400 SHA-1: 55c211f00f78e840653087b990a0fbbd7d567992 SHA-256: db3becfeca9c1c0b8823b09b9940d8679d800dfca7f67513d44c287b7d1357e6
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. The heuristics reveal it functions as a link farm, directing users to multiple external websites, many hosted on compromised CMS uploads. The presence of numerous links, including those with 'utm_term' parameters, suggests an attempt to drive traffic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609858075409e---refarejuxukotifulidep.pdf In PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f9bc08841d30529915a2b3558f288968/36664419963.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/2q7funjpto9ig6pnu0e63fe7i5/74020534628.pdfIn PDF document text
    • http://webbuilders.com/files/file/94199459415.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccad66497b---mafubaweju.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/g34e2qje6i0efibl65ci699g08/68744271355.pdfIn PDF document text
    • https://7gking.tw/upload/files/jisodojel.pdfIn PDF document text
    • http://dhf-china.com/d/files/35914400186.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/kipowegulifasutolu.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/72546488712.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d3040f0d---kevubepomo.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/fdacd57c26c426d277b62a60ac2578de/punop.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/c376420102d651b0ab17141768289ee1/zovodu.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/letizurasobul.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/87ba81ff48c30cd684525b0f7379dd1c/razapojinubawalowuna.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/su86nvnaoh77va1th845dmf9rk/lazunedogavuzojiwa.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7f8619463---ligifotejavomalomufovi.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d7fece54---56871780484.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/zuxesivotafelikopotonaf.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/04cfc9055730497b6680e96bb6f28477/jotowiruwobolejejuginufo.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/a13e3d2ca4166b922bcd6bfb89d2671d/lepajimuna.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce880b197d---gegorukivevexi.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/bagoxegeviwefidosedil.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d200180b6c---sebutawipizerikog.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c7d4b6ad53dd01166a5794db47c3772d/golegofetigumirepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+meaning+of+edictPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00016f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F43 18512 bytes
SHA-256: 1f460aadf481e938e8b42de792953deea7dc22dd1f9ef5e99a27551eb81eac75
font_00_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 10572 bytes
SHA-256: 8324864223344b50a921c5450122c09937b7123b66b722eba05763808cc37f7b
font_01_sfnt_off0001133d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4F 22708 bytes
SHA-256: 50eb8a52b370b01c217fba304c8f2abcd95022aa409b25f0589c44b6043f87fe
font_03_sfnt_off000164c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164C5 2440 bytes
SHA-256: 809a9bd5d2bbb9cd41440f651c816bdaf2cd5c04adddaaf7f3d530bcad426732

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