Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d674f7d79f1eb9a…

MALICIOUS

PDF

72.9 KB Created: 2021-09-19 19:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a2b9896b65edf1f572d7e5d27cf8d8e6 SHA-1: c0c140a0f266ff8b22153288511320f22edfe453 SHA-256: 9d674f7d79f1eb9a74814affad4c783abcf38ef4a9a299dfc2b5329ac3962259
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which host other PDF files, suggesting a link farm or redirection mechanism. The presence of a link related to 'clash of clans apk file' further supports the lure of potentially unwanted or malicious downloads. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://tafgambiatours.com/userfiles/file/7863500547.pdf In PDF document text
    • http://mengnuanua.com/app/webroot/files/files/20773221488.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/73390456941.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff781e7fe4.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/dofanawad.pdfIn PDF document text
    • http://iltorg.ru/upload/file/bevez.pdfIn PDF document text
    • http://101balkon.ru/upload/files/mekarib.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/kivez.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/92488461624.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/95319260202.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/rinarufofofujatufurutu.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/52123742175.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210906_C92358F76BD3C09B.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/sugamusen.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/20b7c89723194d709e243493895998e3/lokemufuju.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/51477752567.pdfIn PDF document text
    • https://cmf8.ir/data/file/13944806975.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/69915606295.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16134335615d2d---36941650370.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/42212430987.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/lijezapiwumiwoxomokozevi.pdfIn PDF document text
    • http://vning.net/filespath/files/20210909055656.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/16383692091.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/loligoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=clash+of+clans+apk+filePDF 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_off0000b9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FC 17272 bytes
SHA-256: 5a8a79782ad4144df66a704216200594d1191028dca6223ec6e9d269fac2b011
font_01_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 10500 bytes
SHA-256: 78264f92f0c2791d09665280b5b7d84598f7b5927a0e8083b16d8e410bcb4438
font_02_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1