Malicious PDF — malware analysis report

Static analysis result for SHA-256 3204abb6d9e4f22e…

MALICIOUS

PDF

75.7 KB Created: 2021-08-22 00:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 476e2bb0f322bb434d6c73bd9d9e8460 SHA-1: c1236b0ed8df0e0525e2f7acef1de35bd7fd6e88 SHA-256: 3204abb6d9e4f22e31ea6a92aa3b91053c4a31a2d5d29fec61535b34727f5bca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and compromised CMS upload links reinforces the conclusion that this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=how+to+self+clean+rowenta+effective+comfort+iron PDF link annotation
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/blqdcshh7dpa8p4mj4nqbamc2p/50692039408.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/072906d46b9619e6f5041178c40d3272/3836832781.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/wabidew.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/sesuza.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/18870727977.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cde86db0---41193668368.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/31187479400.pdfIn PDF document text
    • http://vizcsap.hu/files/file/mokunuzaxejozezoxu.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/lijudezibidipata.pdfIn PDF document text
    • http://paliukenas.lt/i/File/50819911533.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/xinumapesinabojidutejer.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38e7613a39---duvoso.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/mijepabe.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/cd0eaf4135b63367f63a2d42762fbf79/80845752200.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/afa484f1402b8d6b0904f8e98f3d64f8/zozarezedilexakogaza.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909511932b0---warimuj.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1610593ecb3ef3---28333064191.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/48obp82rertat58h0809s76na4/bavobubiwu.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/meremuxafeposogiloroluxo.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/kimojagim.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/3086706750.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f7f1643b---potukizalenotimibugebed.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/0f9af1ec518e6157c91f71cdcf88c689/pinemo.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_off0000c5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FB 16252 bytes
SHA-256: dff87202e26536321e6a1ebb168450376609c37d37e7d9ed6870c580dbf98c68
font_01_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 10640 bytes
SHA-256: 9eed0c719e2b2edaf54a0e4ab32aeb108c34a227635d39f53c511d0448902a8c

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