Malicious PDF — malware analysis report

Static analysis result for SHA-256 415f82b71299de13…

MALICIOUS

PDF

84.7 KB Created: 2021-07-09 00:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: acf78f9e9926c5d37d645179b59fde1c SHA-1: 380cff705cab2c6107a710b0bba668af9889dbce SHA-256: 415f82b71299de13a3866050447740b5088a44d2de0dbf4d6e87543c23d6c76f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external URIs and compromised upload links strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://krisoc.ru/uplcv?utm_term=complementary+treatment+meaning PDF link annotation
    • http://sendedianqi.com/upload_fck/file/2021-6-24/20210624085019853575.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/bezamoxoligodituxanozuwok.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/f5k0bikr7011lhk7uis8otfr7e/ridivo.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/tumedidon.pdfIn PDF document text
    • http://altinay-law.com/images/file/78174232432.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160783d738dea9---gogenipabek.pdfIn PDF document text
    • https://mfdesign.hu/files/file/37666500565.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/33768181096.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/52ef1747b70f49231f5b3f779677728c/wamemoseraxofu.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/66020489189.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160aa96b7bf6c1---litosazumigijusu.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/73954819009.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/6441553823.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/89664396230.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/wodimeneruxizowu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e37cfcefb83---wagufipibulujizipe.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/repar.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03b3a644d5---99695499523.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/zixagirisamizefof.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bf67d3207e0725d08716895438ddb64e/bevolewolubela.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeabdcaebc---nibosa.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/bikuladinuvetitogonepif.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/85c55cf3f3f7626a8fc845deab96b560/2195168924.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2278bca6d---vovoxeritapo.pdfIn PDF document text
    • http://tcihk.com/userfiles/fumamuputozog.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_off0000eb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 16268 bytes
SHA-256: b3ef6061fba9875a31568a4ee386c9d4f45c11647ad456b544bc8cd68146d22d
font_01_sfnt_off0001155b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155B 10572 bytes
SHA-256: becdb39957bfafa19b9d34e2b699d340dfcc72a0199616e32251dd0bcbac4d63
font_02_sfnt_off00012d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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