Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c803ee62d39a08…

MALICIOUS

PDF

95.5 KB Created: 2021-07-03 22:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 01a1306801d8e237ea0d88d83c875828 SHA-1: ecdfb406e28996a3267ee4f826a79a315945eded SHA-256: e9c803ee62d39a085959a7caa1cc75f08fb0295c50431458a6ecaf953965b516
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=clustering+algorithm+example PDF link annotation
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608472c05f057---68413347959.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e87218b3a0---nutes.pdfIn PDF document text
    • http://blueyee.com/upload/file/301556256467.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/3l2o1cu4v5v7e7tihb0nerhkss/88460518459.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e5cad427f5ebcea4126617b68f7471d5/pijelazabidetawiwavebuda.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/80383076275.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/sugavujupepemuxuwuwegi.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/cb5eab8e93aeab1b9c9c69d9128cea37/danoniv.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7abdc4a2f5c5fb1f0ab51d641e40aaf0/94898528296.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/kinoripuzi.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd25779d988efc43d2b01de6c0422e16/xujovezutolitujikikizomub.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/37404689290.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078a633b193b---42556706164.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096124364ea2---givuketolipuduninuv.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbb1d7bc86---zatenewu.pdfIn PDF document text
    • https://eternalbliss.net/file/15089705987.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bf031af084611c3be3c43cd3cc86451b/88341785453.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/dizub.pdfIn PDF document text
    • https://mattress-leader.com/media/77727578186.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ac08a323ae6b52eacec0b17070627562/kugekixajixap.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ff57e724b---lizizunadaluvoxisegera.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/gozozovowosizikimagavi.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

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_off00010d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A2 19124 bytes
SHA-256: 95ced28d5ee3deeaf69d3712bb89f8d2265c3f5a3efa918f2d12913d926a9411
font_02_sfnt_off000157ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AE 10932 bytes
SHA-256: 1b39bb8e20669887c636599f4b8344e5ef6234b478502ee23062e42fee984c40

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