Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f716959c9fc1d5…

MALICIOUS

PDF

90.0 KB Created: 2021-06-30 13:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed012c8a9adedffe5e0360ab1c6d0a9e SHA-1: b7b99123f2941c6f0d8848ccae0addff967d3f4d SHA-256: 07f716959c9fc1d5a060ce045c2f45738ecbdb6a5f3104fa0dfa21432369a140
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=7th+pay+commission+pay+matrix+table+pdf PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b397124fa8d---43538179221.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864fa4b9d1f---kavamuv.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/kexixut.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959a95c1307---gadavogepurevurizeg.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/luwogaba.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/xiwekivizije.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/ladazujipulesukarupubida.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0jau6ku9rtr7tq548j7ai8klb4/muwubedojibesinuxeve.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/91215696824.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a14f83304---xigekesadasuk.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c68afbd3ab---ketum.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c5ad35042---bepanukijijof.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/51165587370.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5370eaef59---zuwaboxubibefuluku.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817d8be7393---wimakiw.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/mulolixetazizegutoriwizes.pdfIn PDF document text
    • http://efrex.cz/files/file/89278298630.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/k5tv0g8esob1f363uo47sm7dk7/64730289369.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c23f43981ea---zazinopepaxanem.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/15172654308.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/jesusukujuwasol.pdfIn PDF document text
    • http://france-ex.com/vikotozegomopo.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_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 17072 bytes
SHA-256: 7be26694d7b2d2f6354ba5a12304d594c50c9ac81e26a1c583fb2e180f7b97b4
font_02_sfnt_off00013f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3C 11192 bytes
SHA-256: 061ac48bede0065afc2702a9bd45905e65a5065489f0b163d4355e1f40cabad5

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