Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d6b4ba866a1c4c…

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 17:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a2f6f333e87884c78ba705ee1b016f9 SHA-1: bb3682176c0af26b2e8a685a9dc9aecf5803fcb2 SHA-256: 61d6b4ba866a1c4c925687d7e534ed1dafdcda9653735eef2e5dbe575e7b1670
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://allytemp.ru/uplcv?utm_term=apk+unlock+bootloader PDF link annotation
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/2beb390a5d8829d1c44c72f1ac19da88/tumiveresorajajorevoza.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/br3b59r77v5o2o3al27j4sm2nl/65936849840.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb886db7d5---42746976745.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/83846997567.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/91712317751.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/gaxujig.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/89401254151.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/xejimune.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210901_143418.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/29756793489.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f95fb71f5---2265892161.pdfIn PDF document text
    • http://www.pilartangguh.com/file/zuzivibifefuxonosawetulo.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/37006282839.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/1941698799.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/41251997019.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/97680952358.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c129ca884---gopujeteza.pdfIn PDF document text
    • http://brlairport.com/images/file/20716325118.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/42938646530.pdfIn PDF document text
    • http://qdjshg.com/files/file/dululuxomodido.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/44354852333.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/72431646160.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/29226807596.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/45746583219.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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 10560 bytes
SHA-256: cdf4d2536890c6e7ca59912fb93b4b57b5ac41007dd4ea324e99cab16ae28b25
font_01_sfnt_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10713 17476 bytes
SHA-256: ee2bf14cd88b814ed20d59059431eac1fc1fe0e0994308cef7c604f50fa26fbb

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