Malicious PDF — malware analysis report

Static analysis result for SHA-256 b060d4500f307202…

MALICIOUS

PDF

94.6 KB Created: 2021-07-03 23:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82be45874be605f932484430b0e818f0 SHA-1: bbbfd2909883fd7982f5ab519891f1a9a913b76a SHA-256: b060d4500f3072021d74ccafcbb065307e849e757292fcc17b12144e21ec51f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's part of 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. No scripts were extracted, but the structure and URL patterns are typical of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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=print+pdf+without+crop+marks
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a26e462069---vupowanifojurituv.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96b528cc07---pobivabirosoxan.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16096d96163259---92714084931.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b620c9c2---38040267941.pdf
    • http://mwflower.com/upimagesfile///9027165829.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a29aec85ebb93fb5033076dd5d67618c/vezel.pdf
    • http://altiro.nl/home/tjerk/file/17838964516.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c85708c37a0---vuwetanuladakugekodofeb.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc713e728f---92118589430.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815ef5745e1---31382937595.pdf
    • http://weberstellen.ch/userfiles/file/20114660439.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb2fdff11---17030471488.pdf
    • http://gps-tw.com/CKEdit/upload/files/53519089216.pdf
    • https://vibanghanoi.com/uploads/files/51964174024.pdf
    • http://czdashan.cn/uploadfile/file/2021051120245373499.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bnfjjmt3ciqiltvk51vtb1c2du/94783596334.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/3da841cfdb55dfa53e5ec26ff99dbc97/netuzal.pdf
    • http://envigest.cz/upload/file/96536943057.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078529d203a8---rujezewoju.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982ee39c5ce---88047546556.pdf
    • http://alemotta.com/resources/original/file/12546052363.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1018becc26---45497419464.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/716203b550185d6b9906e7fe1395bda1/54489154171.pdf
    • http://amandamaitland.com/images/file/sonalosojavadotosuzoge.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7d0117b47---12702726808.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bdf.bin
be446077ba16bcc6d2052757bdfb90f685a26d1c1a22b0410ff976e7261975ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 10984 bytes
font_01_sfnt_off0001253b.bin
d3672376872918378c163592d3920cd45e706a1fed127024a619f88b7a9328cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1253B 18236 bytes
font_02_sfnt_off00015529.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15529 16792 bytes