Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc588e47f3a52ce…

MALICIOUS

PDF

72.5 KB Created: 2021-09-09 12:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b23f1e12c022db5a5253d4d1b75d99b6 SHA-1: 672a7aeb2a8b79297e6f3fdaf3d55871429a1363 SHA-256: edc588e47f3a52ce4e9ff11267cdeb55a4cdb6b0b9feaffaefcb7605babfaf04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://alwillislifecenter.org/ckfinder/userfiles/files/xegejewimarevada.pdf In PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/vipolopomasi.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/zekajega.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/46079675189.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/89725532757.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1ee53984dc6c2dc040ea75e3596a843/73888631196.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/sezowutuwe.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/78557681597.pdfIn PDF document text
    • http://falconltd.pl/cache/file/67782592304.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/novun.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/nuwisigasaj.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/57365140149.pdfIn PDF document text
    • http://ifap.it/images/file/gusip.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ihvr038hj8q9gu03et9m85vt57/21157439547.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/12187907446.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/gawuwosufefag.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/46843754309.pdfIn PDF document text
    • http://linza-market.ru/upload/files/55673357751.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/toromolupugogexemej.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/sexisezow.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/sorezatorinulonor.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/gigifogawefetaf.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/vazaresigazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=shadow+fight+2+free+gemsPDF 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_off0000b7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E9 16816 bytes
SHA-256: 1de7dae0b28d45d6e122c48a0b8dc300ae3a2358cbc953e2b540c43c4e78809b
font_01_sfnt_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 10932 bytes
SHA-256: c4c50f5f009b3ac0256479c3d74f819a5ea74feb7a08f75ae0feaa73f4bd117f

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