Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba639b89db1140c…

MALICIOUS

PDF

84.1 KB Created: 2021-08-16 08:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c38946f5bd09e10a9dc77e6a0b43d437 SHA-1: eb6252c25d43af2c07755a8085b75015c96ccca3 SHA-256: 7ba639b89db1140c8c9ade2fe0b484cc3e6a512a693d47186f12296c6dc9fa1e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fatimaartwork.com/userfiles/file/sizozumafigise.pdf In PDF document text
    • http://rayanchem.com/d/files/63694249171.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e6b2cadae---wedowidawatusiwafitag.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/52092599171.pdfIn PDF document text
    • http://bienbao.org/uploads/files/8322666582.pdfIn PDF document text
    • https://xn--faade-zra.ch/ckfinder/userfiles/files/bozunaj.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc04c74296---dafadilefilefuwatajulol.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/54009708662.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/96657958086.pdfIn PDF document text
    • http://faradbox.pl/files/file/kefakawa.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/34589183777.pdfIn PDF document text
    • https://sanagustin.cl/files/fisusinuniradale.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/dojawutirogivolez.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/5bb4810bfc050b65f3853396d4380a78/vukitotun.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/c6b674a2cd4cd3698237de9cb6fa880a/nuvavedozobesewavitipedud.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/juvewaza.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3aad58fb9---tivej.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/dvi3e11thdep74t7u4fl9f1bto/38253796008.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29ac58bf1e---tizixaropujin.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/vefoliwulusivojeko.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/97268549478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+pair+ihome+speaker+ibt77PDF 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_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 17688 bytes
SHA-256: d8be4738a05c8371f8e3cf00e30bb9a0131bfbfc6e85f8d3d30dfc13162fa706
font_02_sfnt_off000129b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 10724 bytes
SHA-256: 8bedc4d6a29a21bb628e1b99c4ad9bbdfa19e3b8ae150b3eaeba6a273897390e

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