Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea763b0f19b4df6…

MALICIOUS

PDF

81.2 KB Created: 2021-09-03 22:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7407cc015bc788f0f2bd90fb472c63eb SHA-1: 56ae45c1a04a9c4752e64a8d146e026fd9ab3bbd SHA-256: dea763b0f19b4df6a9ceb4e5aff50f06d33b536d4966b74c6fd5086d35c892b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=shelter+from+the+storm+chords+pdf PDF link annotation
    • http://gruppocinofilomarsalese.com/userfiles/files/63356085809.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/828af50c011a5924a665b63ba84c21cd/tezozosesejawenavafoji.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/72875968820.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/dixisisadifen.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/ridomenegerosi.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/63252720387.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/62608036942.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/jazupazazirusuwod.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/zadobarabewivarodikub.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070b79461614---62674432540.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161252573b8400---16043674493.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/52561d3b4c44ad995d6f740e40ad7275/86730291801.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/4dc702b6f79e38e49037e716bf8357b8/pizuvudovedazokuni.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/3727028604.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ee54ea68---47227802421.pdfIn PDF document text
    • http://mega.kz/media/upload/files/16043632055.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/78271044641.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/wubevugokebomufemerarabij.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/99080379491.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/10491f59768702b4a4c0d2b873ab790a/8732478860.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7712e7910c---18906959502.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6f34f75cf194ec94335fbb902fbe87dc/45800887791.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/58357991098.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/44221192545.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_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 17520 bytes
SHA-256: 691e3640621249a6805220b77325c6fae76a654ad9651689b771dfb553e70917
font_01_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 10600 bytes
SHA-256: 8acf46ef9d5a55f7023d92ddf75c7790b5a40654a61e7d847672055593be13cc
font_02_sfnt_off00011eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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