Malicious PDF — malware analysis report

Static analysis result for SHA-256 8565f1334a04e4d2…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 04:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8287107aa858f2e8ddeb219c9c63a529 SHA-1: f704c839db00c4db12cb960c9ab64d5b73bfb58a SHA-256: 8565f1334a04e4d28e83d72dd64aca87b81c3e24af39134b5265c8aa17cf7ec7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://catamma.ru/uplcv?utm_term=walk+two+moons+by+sharon+creech+pdf PDF link annotation
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gnb9h35lijftm0d93vnqdd3d00/89681190869.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/sg6kc76hhun0rda7d3epci37el/50998251821.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/86545583250.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1603c76e2f---59346824889.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/hlq75h94r689dbfboilc06qm6e/sewufazineradol.pdfIn PDF document text
    • http://rideco.hu/upload/file/96750897810.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/14997363652.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b351de452950a4f2420c55e46d6d1391/81814743083.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/67963816676.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968e618acb1---65448973542.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/52928096604.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mbburpkvse4uadgbtfojblnhs6/masutuzutejasajuges.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/dexut.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5c9cc3430---fobezefipefoderemasos.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160db43b5b2eb7---76041871361.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/4ubo41db7n4j29lkjuuu3ldqe7/sojidisefozagitupuf.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/3a6417608f713e3086be5132c505ca01/94378919907.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f111dcb772---porajagusumatijuzavu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/28cd49ef299805179cf6a5ed738ef7b8/bumunavigatox.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba44de961---35459706308.pdfIn PDF document text
    • http://tano-cable.com/d/files/37513980575.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/67777801ab630ef7ff651827f39a4600/pisuvowokojisana.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_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 17876 bytes
SHA-256: 1aacee7a774932221460693d197dc18866a623055bf3b62c11819f0149150e0b
font_01_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 11216 bytes
SHA-256: ff26b28f1d73166df82eab169bbf936587647c34dea965eb8394b407f9d411b5
font_02_sfnt_off00013522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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