Malicious PDF — malware analysis report

Static analysis result for SHA-256 0489167714f7010b…

MALICIOUS

PDF

99.1 KB Created: 2021-07-19 15:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fb2afdf153d13e13830de7ab9e9d302 SHA-1: 79c6260136eef4188713949f475647db4c25ed14 SHA-256: 0489167714f7010b3d267ed7baabf81e3c868ae932117bbfdc91a7d8dc7aea9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. The embedded URLs are designed to lure users to these sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/9800196718.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3731d946a3---22785856546.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/robijonorugomadixilidajev.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da71f15b5c---fekukudigibexub.pdf
    • http://inwama4.vn/webroot/img/files/51180053276.pdf
    • http://aotwresort.info/ckfinder/userfiles/files/pelofuluvisululupo.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d1abd0e53fe---zobefekikazedujo.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a977f421026---94267988614.pdf
    • http://liddellgaryfamily.com/clients/863293/File/338536217.pdf
    • http://tnslib.net/userfiles/files/77119330129.pdf
    • http://gsemilia.it/userfiles/files/zorugiruwewekekemek.pdf
    • http://www.cafeinca.com/img/public/contenido/file/77565785300.pdf
    • http://tencanpowder.com/d/files/safonazotunowafiwigubi.pdf
    • http://forter.vn/hinhanh/file/94919628483.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/b9649065c4e51f48860c359579c63173/36005754384.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/da0b36e6736ac9f0e0ad8f6e3a2bff70/4588192165.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073938881065---55837265331.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5897736478---6350007814.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac70093192f---tojafituvixanudasovimaluk.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/33aef1275a0a72563ede232ccdca17c7/xujegikotumaxu.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/0e8b59db0f51ffbfa545f0239c1374d7/xifusixetikanosulimofefum.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8442b6eaa06263333347bfb39d3cf6b7/lazasakines.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5484ec69e7a053d4852c28a652b441b1/kewaru.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19ae29ef7---88562017705.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160750b373166a---91146996212.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=identifying+significant+figures
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b74.bin
59e4c11e9cd6192662f502fb2c5ed2e10cd237ffd1711e51e35d319bb938491c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 10652 bytes
font_01_sfnt_off000133c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C9 16792 bytes
font_02_sfnt_off00014bdb.bin
d6ea72e4033272ac15ddeea6075e232b2dc4cd9f95ad95287c81a713300604c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDB 18600 bytes