Malicious PDF — malware analysis report

Static analysis result for SHA-256 061ecbe0f5ea22b1…

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 21:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8111c18bbf4bf64e604a089dff51e763 SHA-1: 912791f45f8a56d60ba489562ddf18b246f2cc05 SHA-256: 061ecbe0f5ea22b1eaaea17d7dd9a08d6254cb1523e44007b84346fa338a6413
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristic firings strongly suggest this document is intended to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://pistant.ru/uplcv?utm_term=syllogismes+de+l%27amertume+pdf PDF link annotation
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abd5df2580f---bakidajinowasepakowewes.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/jusuzozi.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/bisexopilizonamenet.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/d8ba6e847a2032e0fb57f27e5b41e86b/95987070121.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/tudodulowegibasobomifokam.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/62505e2768b91302a7d69c063d07ddba/14063939540.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fe999176ccc19c270924e88c6651305c/83677875579.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/ravikijivoxikisalozemibo.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/gelugimujeteroluxek.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6856ba027---19495603452.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/02db814b447caf77be139fb81eaca5ac/zatineworabuvigofofub.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe2ddd156e---40486338775.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/79174506167.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/43567982003.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54e8f96067---vemubiditokeburaw.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/benurux.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/60982572894.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/koruxexaz.pdfIn PDF document text
    • https://starbox.fr/img/files/zaguliwinu.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/om7dvlplpap2ssoormchnr8g7g/dejamuwijigotuv.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d867c310f49---dabujuforelobisovowepipe.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/493249837.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/bb4ca244488b3ff5c8da10f6e86079a7/pabusujexur.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094eaa38498c---79091392492.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/zakumuzojokuredidimu.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/pudexaw.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_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 11060 bytes
SHA-256: 1667fd651d1d0bdd0e2db3ea83862ca73c4b3d2a2a1e64eae6ac2d4bbe7a8775
font_02_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 19216 bytes
SHA-256: e2ce7beb604ec7b2cdf6bd219d4a463638684719ef53fb2e1d2aa862ff95f3ce

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