Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed20f5eef7e9df66…

MALICIOUS

PDF

103.6 KB Created: 2021-08-06 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c033578979bab4472ca49f1f3c679f46 SHA-1: 0b456e763f2717ef3dac215e1521d5c0c92458ac SHA-256: ed20f5eef7e9df662d34cdb48df844b6611bfbff27459619bd31e1d37cce40e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=how+to+make+netflix+free+account+in+pakistan PDF link annotation
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e2f3a8eec9fe60e5afac62e0517be044/ravesoxeret.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5fi1iiu55g9gpb2o2kuan2s0a1/vodelojotozigezojo.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcde6df014---kujafagovejogifudupox.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/72635277969.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ad994f2e---64120175284.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/b42os5dclfl0kt6npderdpeim4/42911829837.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a781e8e260f---60152050886.pdfIn PDF document text
    • http://pi-consulting.ch/download/93007494137.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/bigemikajimesigejuvunir.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f0c7d8544e76993d1e6430dd91f4529e/76970284290.pdfIn PDF document text
    • http://hak-al.com/resimler/files/51954170975.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/71882344062.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/34j4gmjd35qqplveku8hpf6m52/tasavegixolikebot.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1r955a72s5vjl3soddajo20s54/89439175209.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609f43761a501---60508112962.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/42855016005.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665809baee---jivewidonopozufulata.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/8eb016e735e0dd7c791bb89e07a55cbf/rujebemujotewurimupiveja.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9593b4e3f---vizarajufemoguwazumubiru.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9d0dfb66---kipuredimuwa.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc9531578---romuregulusuvojazeser.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81970707f8---balamebodajiso.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/kosalokukubofopaw.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40f2304b3b---xopasosomiwuwigufijolu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_01_sfnt_off00012f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1F 17876 bytes
SHA-256: 3ebf52a3a0583cc21d53a731356bbe1930c9c039a5c0250404b628d3f0dcc07c
font_02_sfnt_off00015e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E09 11012 bytes
SHA-256: cee74bec506b66798f48da233ef8f9d1b1239a793487ea4d73e60d2211f13a86
font_03_sfnt_off000177a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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