Malicious PDF — malware analysis report

Static analysis result for SHA-256 d170ce3ca1e7e72a…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 16:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bca23f75098d64d7e27c57382d8970f0 SHA-1: 66c6ed506fba77b7091284e38f7fc6f68fd26254 SHA-256: d170ce3ca1e7e72a45a3491f0a648135d8beefd071498f19ce7ba6ed54e174d1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://zxpgw.com/userfiles/file/67105013970.pdf In PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rrdq5mbe5oros5o8c9me6dck8v/14842238442.pdfIn PDF document text
    • https://dm288.rs/slicice/file/55629368151.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863165285b4---59171068230.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/27910898607.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/puremuxobakanukafotopa.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d810b0d5ea3163dcd067d6eacb3473c4/fifobano.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/nukopazunegebuvizilubo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/77f232bdfc93b8481f567da687ea43f1/17475572908.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf3782b857---31086029063.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/19755279048.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906af153703---ramiroporujixobokutoxozis.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cnvjr52llbafgu73lv8ekk8pm0/9058412124.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/0569c36c298a9600f19075c3b15765e5/sokuvasefoxe.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/61060985468.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2149856b7---17302714331.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/42493852434.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0610e739---nalofejanodakowe.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/b2797f7448729f109b0dfbacaa545548/matupadonomiruki.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/32723033583.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/31398584031.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d56e0bcc57cfa3488b48c6ef00eb555b/bomaworopibubiparajomobe.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/51909069098.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/pudisivesejoxesajavoveko.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/zadubifedesagedekos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+we+calculate+the+magnification+of+a+microscopePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 17100 bytes
SHA-256: e47c4823eb591f039a83cd01e2718ba61c840048a5f57a80d5fb7330bc1a59e2
font_01_sfnt_off000110a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A8 11244 bytes
SHA-256: e509ef33ad1af30e181d8aaec4632a33880cb0eb6938036ce12adc4b7750dc47
font_02_sfnt_off00012aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1