Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaea611dec59eea…

MALICIOUS

PDF

107.2 KB Created: 2021-07-25 23:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71ba27650f840162fe5e5e3454f3beb1 SHA-1: 095aa5268e02a45f6d31100315ef0462fc3fdeac SHA-256: deaea611dec59eea60d6668ffae10c32a3feb4d9db80dc07cc4aeeddf2e6ece1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The presence of multiple links on disposable hosting further suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://domeinbeverdonk.be/assets/files/file/bibizaxupusebopov.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/7e118c1bf2efde5d6a1ff9dfdcdf0596/rupebav.pdf
    • http://zovsh.com/Uploadfiles/files/gafaxotekikemoxogi.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a152f55dcb7---21159418070.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081402570f10---35738630955.pdf
    • http://gocchame.vn/app/webroot/img/uploads/files/71073148589.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc61f88f1c---16947812698.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/08bafb6f89595f6ae5268ae824fd5d56/89680302428.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/3cdd70499ebe92def9ad53e2f4e41fec/61955572625.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7b9b6eb4bf515d3dd2f86003c558019c/xagikuvajatijeguronu.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/sikonokuredipomosivep.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160787a231c741---mafutuxolejomifowaz.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/64634445560cd11ad96b8d.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924cce725eb---wodakezofesulepod.pdf
    • https://selltoob.in/ci/userfiles/files/wobelivigiwirepelusiju.pdf
    • https://retta-bg.com/userfiles/94041305057.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad140f87fd4---10816992060.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tlvosj0a6odure0osmlfkp4c2q/46116198999.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf7172485---nexawosarosujadesakeziju.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb9feb528b---81406619468.pdf
    • http://aotwresort.org/ckfinder/userfiles/files/14587019420.pdf
    • http://normel.org/files/upload/file/74132345320.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-7-14/20210714044320371429.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/11c10e79aabdab0ce65940e0ebcada17/14568619657.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=can+you+buy+hypodermic+needles+at+walmart
    • 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_off00013d46.bin
68a158476da6f3a58b57dd1f18e0603e752d3a032742d2751fc4334884ef658d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D46 11248 bytes
font_01_sfnt_off0001574c.bin
04b3d1ac382863deea6f401b52c36356cc0063ff0df22c59cc1aa189dbf50793
pdf-font-stream PDF embedded font (sfnt) at offset 0x1574C 17892 bytes
font_02_sfnt_off00018697.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18697 16792 bytes