Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d833d2f8fce11ac…

MALICIOUS

PDF

177.2 KB Created: 2021-08-09 22:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: d6fbf5cf844cab0894cdfe5bddcacd54 SHA-1: 9cc9e4ef29ba462be599761262cfd6ac4fb4698b SHA-256: 5d833d2f8fce11ac54e82b9357d28e22f1707e10396de2d086110b6f80b7e114
212 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

Heuristics 9

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pistant.ru/uplcv?utm_term=les+miserables+play+script PDF link annotation
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/dt655tgtp5rco2a79httf6gog6/fututodepebigakorefiten.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160755d8fd3783---33368652169.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/nuvimoderev.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/zekasugebazolofopod.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/75ac79ba6b03e8da4a6807010f712714/1983873364.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/52667785325.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4708007cf3---wotedopaxitirot.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/c527e20fa36bb1ebd2e0671d3b83d524/63282969464.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/16cd9adb19aede39c9bd78eae2c25bb8/14034411612.pdfIn PDF document text
    • https://schmitz.cz/res/file/xedom.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160705d116f622---74322151750.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/31096248307.pdfIn PDF document text
    • http://seamacros.com/upload/file/91174480278.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/45761683945.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/5b9ac317b7a4238bcd36a7dcace037d1/golomenasetixudis.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/28622091473.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c5cf8672b1---69487025441.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/90441321662.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bf92e2748---87210215192.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f22eb6e6a---seteletinarijazenexes.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/volonetog.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/60b0e1c8594a2db0d44c5b9e621deeea/moxewakos.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/dininobakuwuvegejon.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/topakupi.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/busamubuwegaz.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/51b4cc2e0fff7266ee900830b5e8965d/87049257357.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_off00024fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24FB1 10520 bytes
SHA-256: fc13656de6f495231bcae6a83333f4af47aa58988da8aea5cf9c77c95bc53886
font_01_sfnt_off0002677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2677C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00027f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F8E 21572 bytes
SHA-256: c0063f4df903de51ed3b005825248ddcdc9b58f23f4a310a1ff7061d53f12989

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