Malicious PDF — malware analysis report

Static analysis result for SHA-256 2014a0881a7f0374…

MALICIOUS

PDF

74.0 KB Created: 2021-09-02 19:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6d164f2df4baed80c15b8ad58618bb03 SHA-1: f8e447c0ba8645a14b0b0e370195a38524f34a6b SHA-256: 2014a0881a7f0374872b8ffe524aa6b5b3716a8cdbf39bb8b8c034a0f5310723
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 as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting sites. These links likely serve to redirect users to phishing pages or download further malicious payloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ankurgroups.com/userfiles/file/linofunexejuvixumiguve.pdf In PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/neduwatirutox.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/22287647925.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202171434482396.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e18439f1f46---6312029895.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/3268241628.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba4fd8ef9---19945251535.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501103201987296.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/visobanelanurezuxefanow.pdfIn PDF document text
    • http://capableapp.com/uploads/files/89052046156.pdfIn PDF document text
    • http://surtek.biz/image/files/20150128_214600.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802c2a349d---92944627221.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/89783517828.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f12226f0a6---tefake.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/mijiragapi.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/fn2o5iunr50sibhsk19vckmcse/85795408916.pdfIn PDF document text
    • http://hkalc.com/userfiles/1605551878.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-15/20210515121018361929.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/liposemekokaxobezesulamu.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/75129873202.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/18822560072.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/340f55646b3b85cb90c6d6b482968f53/18676462583.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9637b7bf0---taxobinofewuximuk.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/xoxafajeravawolimikopu.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/98990477032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=codigo+civil+para+el+distrito+federal+2019+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/nabaxanerapiwij.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_off0000b9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D4 11248 bytes
SHA-256: e6a089fe400a652485e8740cc76aa016dd5b64b9e7e287d36467d295c89325bf
font_01_sfnt_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 18140 bytes
SHA-256: 69ac9b62bab1b9cff3676660048bf6302f21c93fd86c51fe4d6f144843c13055