Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f6034fcc444a76…

MALICIOUS

PDF

106.0 KB Created: 2021-08-18 00:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8335448187b4e7b77a0ee3204734aa6f SHA-1: 08df041d5520f377fe71596d86cf80caa0ed7e18 SHA-256: 17f6034fcc444a762e18006249bffbb559d9e717a2ad78b3a03f9259443cb74c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised WordPress uploads and disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

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://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7612c4c7c225bbe3ee1cec9db33a36d6/66215533079.pdf In PDF document text
    • http://ccswcd.com/userfiles/file/zuwexasigodew.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b8302282e29---32346100564.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/54388473818.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/68315758170.pdfIn PDF document text
    • http://coffee33.ru/archive/file/mulotefawinajevubok.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/28250904628.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608818a8be128---52762408330.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bfcd0b885---2383094357.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9108d548---najedovexisukinolizur.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/gegomev.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/fekisapusegurunidid.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/76040107066.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/rawujajez.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf47e1dd35---72116947599.pdfIn PDF document text
    • https://artenika.pl/fck/file/60582936898.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/87a95cbcc666af6fb7eb32799d25f72b/25850431587.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/pozivebobasebine.pdfIn PDF document text
    • http://samtekelektrik.com/files/99909682910.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202107042344146239.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/dadofomesemamas.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160915b808ac65---77007261709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+download+hypixel+skyblock+mapPDF 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_off00013ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000152db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152DB 17840 bytes
SHA-256: b32a180493fe0a75bcdfd9237566ae218f000d2b224f6d3a5b7e58a3c417e32a
font_02_sfnt_off0001807a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1807A 11204 bytes
SHA-256: de16bfd6e54e42bfbd4fd123d09972c7175b37c1960fbb258275debec0cc4cb2

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