Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9b2c58c0a6b3bc…

MALICIOUS

PDF

86.0 KB Created: 2021-09-17 00:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 67226fc22a1bffd29c57612540e7d3d8 SHA-1: f9179d63c615f444f38a48650890f3452bfd2102 SHA-256: cc9b2c58c0a6b3bc1763c138ef5e7ad8c66b222cf14d85ea5ae7586bab2661d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. The presence of external URIs and the link farm heuristic indicate a strong likelihood of directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://allytemp.ru/uplcv?utm_term=photoshop+lightroom+torrent PDF link annotation
    • https://ego-sofa.tw/uploads/files/202109150157595668.pdfIn PDF document text
    • http://8njl.com/userfiles/files/jixififugalatavu.pdfIn PDF document text
    • https://vigilanciaweb.cl/dinamicos/files/file/8634746839.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/vikiwosomifejamawezetud.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/60749114874.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/76733690538.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/84520996920.pdfIn PDF document text
    • http://talesma.com/E/file/37472432010.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/79094450241.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/pujalixonoradurilarafo.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/65859957085.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3ea37280d625e9dff15a5073a7f968f1/62780792916.pdfIn PDF document text
    • https://hiroyoung.com/data/files/sijegipezejonojoribo.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/28258972099.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/84159106534.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/38953996736.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/97231637627.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/64326674607.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/kudamaxawugaji.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/98411090759.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/salefipuvesapos.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/73906325444.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/gewin.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_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 10536 bytes
SHA-256: 01471c9c29aa44ea04df53b912b6aa2c35252550a69bf91bb6599bb5e0493b4b
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAE 18212 bytes
SHA-256: c95c43207316cbbf9ed09aebfc87b5e7914c08fe0b0a20e41c89eac2dda6cb25

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