Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abf7a291e3804b8…

MALICIOUS

PDF

88.4 KB Created: 2021-09-01 11:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 254b74c215e2dc1fd0b1b2e7c8d2525c SHA-1: b51180b86c4ccd7ae2ad80c9bdbc1cdfe0e9a213 SHA-256: 7abf7a291e3804b8fcc1fa782864945ec7fd2c598f8cd952d2d613410595d422
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are likely part of this redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://centralgiving.com/media/userfiles/file/losilasowud.pdf In PDF document text
    • http://deryalvincotokurtarma.com/userfiles/file/puvapusivokevisud.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/13407184428.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/82660602760.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/28219992220.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/45154686335.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/jawajitefabizubepof.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/37907244484.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/1386984222.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/mavam.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/57173709257.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202108182033491827.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/loretum.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/zuxutaw.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/61862261916.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/wegifemalikugesed.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/81171f37faf95db5fcfeb3fe2b18df2b/27354569504.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086679b8e5e2---forevuzogowi.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae128b9a155---8320427160.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6dc7c8b825b9524aad18bb126469b65/xurufogoxaxu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ia8etmli3bm9la4ks521619bs3/85122980140.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/sumerudaletolanesewajavet.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/wuwuxowo.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/64619123233.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cool+divinity+2+buildsPDF 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_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10416 bytes
SHA-256: d609c6f92e49676de950b3c2a304d0b6aab056e46fc5f1461d5737adb353b660
font_01_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 17828 bytes
SHA-256: 534803cb096e8dda8868b97b1716f3762d7cb881b1637112013176ad9f1471d4

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