Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7690db17b075d8c…

MALICIOUS

PDF

90.6 KB Created: 2021-09-01 05:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 20b43a15ee7d41dccec233d7975f1e39 SHA-1: 1275bb544efa3aaf5c4c88e63c6887a47e22b684 SHA-256: c7690db17b075d8c7d3da7d7e1e9e4719ca2e4dd09b79c985d25dd1999d85361
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. These links are likely used to host phishing pages or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cd3b41811---gitopotumobiwekokefija.pdf In PDF document text
    • http://namngonviet.vn/user-/files/32123141459.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/4929914683.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607755e855d19---63289313208.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/gisakez.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/80918682612.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/lizurefi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/jifovejati.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/vikavexem.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/15854159650.pdfIn PDF document text
    • https://steammining.com/userfiles/file/97462196296.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/boxakelawizotamigaxosin.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/ligorezituz.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/30d47cdcf15719bf74cd54656c19dc2e/vetipuwamafetaj.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47864fd8d---17625745537.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/7bcbc9522bca2dca3bc48421ca359f09/lubigenubamazef.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/57198528381.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/94489622184.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c255748996---dumowugedesosujiv.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/vodozewobititatolekewep.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/lmcqu8f4fjb2ngfoh11quebkl9/85612625396.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0c358658fe341c3103051cce3a24330/79879226964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=be+let+downPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 16264 bytes
SHA-256: 3bd0a3539d4deb30245f86ed928209f6476137131e9e9cf43e6053a41c120512
font_01_sfnt_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 21992 bytes
SHA-256: 4ad04fd86cbbb04985015f0f7e4ad81fdbbdb4fe0a276eb75da4db5020e08aa0
font_02_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBD 9860 bytes
SHA-256: b48a6f188d48e090bf8944312538770ed964dee36222d371cb7a6b9084b071e1
font_04_sfnt_off00015398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15398 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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