Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6e2b8b55e1fefe…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 21:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 53e3a4066f4889388909ffffec1a19b1 SHA-1: 7e383ab7d5bd5b4d21542f939cb915b58350d97d SHA-256: 5c6e2b8b55e1fefe9506834d14ffcc0491cc9c22de398f816fa7856287a0709e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://ketchas.ru/uplcv?utm_term=how+to+reply+tell+me+about+yourself PDF link annotation
    • https://123natura.com/stockages/files/piburufotog.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/54110844976.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/4edou4jakkcdmu7m8hmr7cjr74/bovenonix.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/simokusazowa.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed6cec77a---mefesafotov.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/c68786b962217ea0388ca90251716351/jogujuvo.pdfIn PDF document text
    • http://www.bandungmesin.com/file/51215755521.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/1067602268.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/qqnpejvlictjck13edbmj4edh6/23266642739.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ebbe16a85c2480d595fe4866a99ba999/rukokewudutaxuzi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078580e3255c---bosovuxasutuje.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///porujafitodiwelijamib.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd279eb487---firevipakujen.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/d0e1d977a00940f448efc75cf6d576f8/pasawudogomewaxevidagag.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210627_184344.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1991fc407e---levemuxu.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/5a87a6b8560de97e18383baff93f6f7e/moxakos.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/tazegerixipiwemabe.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e69aab68a---lukakurajigelofu.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/29228180425.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/5gadk9u8k9eb5ai0ie6m4mhesb/17528356626.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/64d45806f711ea17cf158ce6cb73db89/44582778838.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/luxomuzawikapedabemifob.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a8e479201dc2e6595eb38c643502b4cf/34305057543.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b806af2e---48912535739.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087527f79fda---55260684366.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/ronotebawo.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_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 18832 bytes
SHA-256: 201f182759a0586b3363d1173b6cf054b6fb2bd64ee304377cf87b7b7fb1b884
font_01_sfnt_off00012efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14714 10752 bytes
SHA-256: 5525536c2e2179cb17c4d1b5a535b0476e5260d7e781efe45f8ea98f80f73f90