Malicious PDF — malware analysis report

Static analysis result for SHA-256 c269225ab2ac2c67…

MALICIOUS

PDF

73.0 KB Created: 2021-06-29 00:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4cc49e47649b25f7c40f062dc79bd073 SHA-1: af145995bf35222279e9f88ffb8231c2dcb0da38 SHA-256: c269225ab2ac2c67390bde37667bcdfc911c49cdcb4c75491a70bcc7938acc27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm designed to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates a phishing attempt related to fake prizes or deliveries. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d776b7b65d86fc9fae5c74d2806ca562/14725061334.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8708e3c1a---lenisoretasifoku.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a5692365---kepol.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c53df771c02---78558651140.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bb1da6b78ba9efeeb6b8dd2611e0c2d2/xizam.pdf
    • https://kawanmto.net/contents//files/9898793706.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/8572fbt3u558p2jjk53i73ru4p/netivawetofefi.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaac70f780---netalufaliribojasitunade.pdf
    • https://a2designbg.com/userfiles/file/vapufakenedafakojovad.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756c68c06f5---dadefubonagatomexoxipoxu.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/fuvupavuba.pdf
    • http://analogsys.com/uploaded/file/130887936160b6b982a8773.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ajhsoi9kkt29muo11cmh933pjm/93741293805.pdf
    • http://www.mediagrand.hu//data/editorfile/36664502494.pdf
    • http://hnkingdee.cn/Files/file/20216115193.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5444a1a5e---72856006694.pdf
    • https://atphp.ch/userfiles/file/18607650199.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/dd98f2b4e1eff12578b6bd53cf020ca2/lomaninidulukireda.pdf
    • http://icltindia.in/userfiles/file/puxeradulolutekuminim.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/jibipefotuvi.pdf
    • http://www.elstar.ru/uploads/files/9236726817.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=html5+for+dummies+quick+reference+pdf
    • 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_off0000b835.bin
328d670753b1b70056c6140e9193d9eba12027a1ed9465977203961d79c6c304
pdf-font-stream PDF embedded font (sfnt) at offset 0xB835 16604 bytes
font_01_sfnt_off0000e352.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE352 16792 bytes
font_02_sfnt_off0000fb69.bin
fb642736da457b4c3de627e7450646085678b5c4b3da3f8a274f112f1a49a5df
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB69 11084 bytes