Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22af790658533aa…

MALICIOUS

PDF

75.6 KB Created: 2021-09-01 07:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f61887b6a10a1d441325c34886c25d4f SHA-1: c375eefbb2d188a65bf89d29bd7dd21c8372cfed SHA-256: c22af790658533aaefe52372d81f02a3977b1d195f9b6a55171e172817f9bab3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://crewmak.ru/uplcv?utm_term=car+x+drift+racing+for+pc+free+download PDF link annotation
    • http://bio86.fr/fichiers/tivafuxezofafenobe.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/843a4c1905279ba4bc42e0474e6f8dbb/padekosaxoruzapidoz.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d596f9a7a5---siranuwibo.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/89727790931.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f6bc053e0a9---38121204612.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/jitit.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/lepufaneto.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/laxojuvatuxusijad.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/88307902147.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7f1b1bb45---43983560933.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/pelomofewafozalos.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611dc4fcb19ab---2331536100.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/gavuviroxola.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/79709123053.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/pqv5c10oub5lcdcics9oakuvlo/duresukovogeposaduxexawob.pdfIn PDF document text
    • http://islandpointfl.com/userimages/mewuniso.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/tibosisekowaxonepason.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/siwukugot.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/22372915770.pdfIn PDF document text
    • http://chinalabware.es/d/files/teludig.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca38f1b7b4---23974056412.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0304d62500---tejekomamitab.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/jovurij.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_off0000c584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 10848 bytes
SHA-256: b9ce2b901bbf36d903464c4f04a4be0301700720d1418df46843736f8c35976c
font_01_sfnt_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 15980 bytes
SHA-256: 9fdbf797dde56af82888b74363b3798be6e23d965ccdb630d14b42a23a1c0f42
font_02_sfnt_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.