Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d31d44dbfbf931e…

MALICIOUS

PDF

68.7 KB Created: 2021-09-28 06:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: 4edb6195875bf42d8af38c51e4addb86 SHA-1: 925e9a5a968e79171492eade15859a84238e7e9d SHA-256: 0d31d44dbfbf931effce486c193f9d507b5d375a8b273e02f859ce219c65bb6f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a large number of external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=soul+watch+putlocker PDF link annotation
    • https://sandp-engineering.com/ckfinder/userfiles/files/44145463443.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/161429d00d6b5f---miminerewemipalarisut.pdfIn PDF document text
    • http://polipack.ru/content/file/fagozisojojolabufabokize.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151aeea47a33---vekijowatesu.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/79575186878.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/dureligawixib.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/28249529559.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/34580805927.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-3/20210903094340685053.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/64633844590.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161423952c7f2f---38592979883.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/xinozufuxowijubim.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16152469ac41c7---45384493484.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/wewekofojitonisunebowuxex.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/fibijipitejezuvamowiv.pdfIn PDF document text
    • https://heyratacademy.ir/file/rolozidi.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/10813411790.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/wofafatonilir.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/biwutonopifeno.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/30759451891.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/rezavi.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/39560306244.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/zulum.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210916131941.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_off0000b14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 10460 bytes
SHA-256: 72af659f458b1c20835d1e5edcd5bfc9ce11d8ead605fc10d53289556707f481
font_01_sfnt_off0000c955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC955 13984 bytes
SHA-256: bb07c27f4fc1b027a81bc640465544596af600eb1bc6236e3113fc5563dea4f4
font_02_sfnt_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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