Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47a74c4c4b25efa…

MALICIOUS

PDF

82.0 KB Created: 2021-08-11 23:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0027bd1408afd9c58c929ca59ab7b49 SHA-1: f6e12b9045031ec3ba7a3ffafd3660be1f232645 SHA-256: f47a74c4c4b25efa4085caa74e6ede08006bb7595bd52000adaf2cc667539f57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest this PDF is designed to lure users into clicking links that likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/64a8d36cd902bd887eac5869688b4c98/juvovakikufexadis.pdf In PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d4eba57a---18056795665.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e16a97309af---13721635827.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c4ac3a89---gonukozukoreninas.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/adfafb3d86e89c65eaf9731a1ed1a6be/nugexopisurobogimi.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/puzereto.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/wokaxebulefibekexeposabep.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f39901e064e---vidonew.pdfIn PDF document text
    • http://hms31.ru/img/file/bejujulojenipum.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/kobevawamelekilotenipoj.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/14d9a05b613bc0f516ef96c9d1f869d7/48395985505.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/zedixebabeseg.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1240b08cd7---67772097087.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/24046109205.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8a903d62---jomisobixalugonabaju.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4dbf1542de41851cb211090838f5937d/walomigoretal.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18c2cef172---16678698180.pdfIn PDF document text
    • http://landpas.pl/upload/file/29062346000.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/serezuxukidinorobaji.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/tamagokinuweg.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/3a6016778a96e1d2f2ea0291ec7fd7d2/razijojojoriwaz.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a864ded38c3---wegovasiwosovipiwezigije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=basic+word+structure+medical+terminology+worksheet+answersPDF 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_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 16300 bytes
SHA-256: 93f82e4bf2ece36650e2708206478eced835a10f66534fce6ef63ea408c20370
font_01_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 11260 bytes
SHA-256: f9ccf055d7fff9aac07f358456db094cf678f616148da53f91b5490aa91edb92
font_02_sfnt_off00012134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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