Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af19f3196294037…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 06:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14cdff18e2538986f1ace16115d842d2 SHA-1: d189529f43ae5c7d7ea63b0e144cc58311122c31 SHA-256: 7af19f3196294037a73c1c69997a258b324eaa44ffc02957a4192de96db766dc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to files hosted on compromised CMS upload directories. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://galluccifaibano.it/userfiles/file/65815700351.pdf In PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rusopibamadosov.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/77817554092.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/l7m5sad0gktq343nlsu5luij26/65133310365.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/27748571731.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f978100d9---mifivarewugugaxofozen.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/54400730861.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f5a1576ed47309153b18adbd76d3d5d1/pitep.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/setaxaxumavepulop.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091de7699b61---51259202874.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/pajupuridopemega.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/lezexedidumomivevimuwari.pdfIn PDF document text
    • https://panama4d.com/contents/files/tidimulejeninuvirelogoj.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/7882398577.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/xiwesaze.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/33197561857.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210721_004737.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/54883752460.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608758a8eb3fa---zevagesi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a3dfb4cd9---84562720698.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/nunuzixatuguzenowivemewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=export+gridview+to+pdf+in+asp+netPDF 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_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 17724 bytes
SHA-256: 607dbdae6af15138c0668e1b08a8e3b50ef7c355ec759b9ddb3598e7949e5fa0
font_01_sfnt_off00010275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10275 10864 bytes
SHA-256: 148660e979ab2fa083c86c0d1b393b37f88e2352794f4b93498bf040845455d8
font_02_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1