Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba4de333302586b…

MALICIOUS

PDF

184.8 KB Created: 2021-06-28 02:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0feb5242a375e0227cd9a07f52cdd8e6 SHA-1: 5cc81201b6a4bbe4c69da0005f5107b4ffe28217 SHA-256: eba4de333302586bf95153f88b208220f208cc26e27294a956bcd1ed604cd4a1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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 https://wastran.ru/uplcv?utm_term=indian+river+map+hd
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b67ba8576---7822932449.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bfae6212f7b8a14484c0e783972808a/35789150069.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/77053666375.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/36901588323.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6ff8fdd9a1d0f2ebb41f78b0d4cd488e/bivumododasuwogitawa.pdf
    • http://frangarcia.eu/upload/file/ledowutagem.pdf
    • http://auksozvynas.lt/userfiles/file/13380375535.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/jt287fk6sugip3djm63rdvts9j/vojijerabivunaji.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/40m1v2evf9o35lionkgodsg687/12594530146.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74c09bc24a5964b7fda75b5439f3d51f/lakibatijivumulokisezud.pdf
    • https://eastmanllc.net/ckfinder/userfiles/files/rigimunawarula.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/893089dcc743860fa70630c01721a5c5/65181148622.pdf
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210602120327.pdf
    • http://crackershrimp.com/file_media/file_image/file/50431894612.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d78c200ecd1---57642424812.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad56870f778---2071814347.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/g4tnnoq7joof156hvsdajtfl01/xufoxaxirowumilemogote.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802e859459---2964922539.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/84529496001.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e64060a0ae---godok.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026581.bin
ad0f25bf1d6b3986b089a2c948fc2dbf7ba38d72e51b6f1d05148e01dbe265f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x26581 10240 bytes
font_01_sfnt_off00027c2e.bin
b74a9ce385167fa33fa0a40d650f11d4d217dfe2b62a4cb7ea9938c11a6c88f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x27C2E 2608 bytes
font_02_sfnt_off00028729.bin
645945fcef14feeca9ee5559d95c657524801326ee0835b3e60aa2dc2900897a
pdf-font-stream PDF embedded font (sfnt) at offset 0x28729 20140 bytes
font_03_sfnt_off0002bbea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBEA 16792 bytes