Malicious PDF — malware analysis report

Static analysis result for SHA-256 167ce1a73754bd35…

MALICIOUS

PDF

80.5 KB Created: 2021-07-03 00:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f680363d2151da04a7a21e34000f74b3 SHA-1: 91060eaf65d56be0cc4c1d93d21f617bce7e8dce SHA-256: 167ce1a73754bd35afec198dfe2c1d4b986b6d0fd8547b637f70d44ae5542d6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to potentially compromised WordPress sites. The embedded URLs suggest a phishing or malware distribution attempt, likely disguised as a document related to printing or file conversion to entice users to click. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/k8c5oh3tacqucihd2omrif75lq/wirabagenepuro.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/f3cd6d897abecde6bbe4728e5f60d1c8/bukalevat.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/rugogemezilodaxowewaluj.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/58467192754.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/60735143726.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/sugorutuwer.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099b445799b3---54553420955.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/e034597f70b8b9d063d6a63d39b71697/38923956725.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbfd847287---74989382022.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea2a9aacf8---11684091018.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/2147ae34226760f3b16043dd29b10aa6/xepafu.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/72101330852.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/vpmqbi35bmm4bt3u4r92oc7a1c/bugeg.pdfIn PDF document text
    • https://susta.vn/userfiles/file/31142857219.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/80579788801.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/vizisilagamuzowifuji.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d7a383f3f17b9475d7d15b7b8fb33545/limuvarizenuvofosipisod.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d90897d5cac---99843085374.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bdcc7abe5---votodijefupaxu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b6976dfde---geguzar.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160818996d7d3d---21739440718.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817f488ebbb---zuzenujodekitovuwu.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021070122545540.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc6f7061e4---24256473874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=print+to+pdf+in+excelPDF 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_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 16936 bytes
SHA-256: c2adc041d34b2118319473b1087f8cba9810e629bf6cda9ef0b1254c3e45d57b
font_01_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 10384 bytes
SHA-256: 6fea5dbe4f475ec946615a2bf872fd72f6ca80d0075ae91c355a60bbbfaf4549
font_02_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1