Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ac4c4d9ecb0b66…

MALICIOUS

PDF

84.4 KB Created: 2021-09-13 00:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c6a4aacc776d7eb69060998308ff31eb SHA-1: 5033604455fdf68e2dde4edf5d35cb0067ea4043 SHA-256: 37ac4c4d9ecb0b665a6d9dbbdfb02fd6098ea4030932cf98bed60b9f1af3b4e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of numerous URLs on compromised domains points to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://3dprofi.net/images/uploads/file/75162430924.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/f0dd0aaa5b4cda6f63a4bd0351fb1339/gadinekarebipinoxaputa.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/be1fd5c56c6e6a72290cdab38c8762b3/15274371521.pdfIn PDF document text
    • https://kapefashion.com/files/files/62567969722.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a2ce39ff7d5345d0a70e11c17201ec1a/32826422566.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/44850873423.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/22663685505.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb510af88e---fomajovubefafojejeja.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/41899389070.pdfIn PDF document text
    • http://ggbris.com/slbdavbatala/userfiles/file/faxetugesibag.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/gukenozasegofosuwis.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/87733474190.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6bfec1ca3---97482251607.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/90163513406.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/veworufepimogu.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/39541043129.pdfIn PDF document text
    • http://happy-land.hu/editor_up/xedoson.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea8b2044c5---gediwenexavipodix.pdfIn PDF document text
    • https://ancoraeducacion.com/images/92443885702.pdfIn PDF document text
    • https://polytex.de/sites/default/files/rojikukekeze.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5fe30f820b7d6d2f0d46377190554b55/bomopituwe.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/48175581691.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/8477070315.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/ragisukebor.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/sijozudilugarexobafitej.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/44283187929.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/lejirepetemew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=real+number+download+apkPDF 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_off0000e24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24A 19224 bytes
SHA-256: 9542f3a189e52b1d59e4ef1c8e5c756cba7446f3bcfdb863432a8b8d7183b781
font_01_sfnt_off0001136e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B85 10660 bytes
SHA-256: 769cb31887bde6cb4bdfb4dd92cc1ab041035b1cb57de5e89ba7f82cd35208f2

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