Malicious PDF — malware analysis report

Static analysis result for SHA-256 731e5038405bb9f6…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 05:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a9d1a8f343a6b14049d31804d538f6df SHA-1: 8e7bb292291a74546c774cbd97c223d570498a9c SHA-256: 731e5038405bb9f69d69bd90308df02c66c312048de4ef0f0fe48906f2d4c9fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16b6ea46d6---pizurogosofimepevuzizi.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/65fea2159df4c27d3c2f57c0f1cc794d/12544946815.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1cd4bf1ea---bizegi.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d571f7381fdf1ac80ca3ed879193dd8/80784321534.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/1527616760.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/mexolisogurokodek.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/puwonuwidut.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/d39qgrer4ecb5bkqf17s7702aq/zekejipozuvuroxokok.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/kufujikunisetuko.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a58fa18c15e41d77c8b997fa8f82a1f4/49937811608.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/kikogikokelosumekugazex.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/4053117002.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/14574945665.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7acd381d---vomaroworevi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878c7763553---megipefopeduji.pdfIn PDF document text
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/33788852496.pdfIn PDF document text
    • https://andrejc.si/files/file/95021903068.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/f52558600ea0d78a3630a6b0616ab2f2/goturopizixogo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2b516b7ca---43709549485.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/wopebimavabinu.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/20784357981.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/0ec0078a9819c7879ce0ce10f0f50d33/64054877671.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/46955834450.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/31c3112f4f30d493414d99c5ae0d3a88/73991127522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=eclipse+phase+fatePDF 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_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 10236 bytes
SHA-256: 32b6f7d5f34c9d26ad6cf01b284cf88c967c811324171ace2e4e38b60eb0d2b5
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 17496 bytes
SHA-256: 27d9167817cf0050e54a04e5851f3264a942c8ff4944c54d2429eb717bbd15dc
font_02_sfnt_off00013121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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