Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e2957a2c6fb89c…

MALICIOUS

PDF

84.4 KB Created: 2021-08-19 11:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f644612237589a5e77e7aa11c0e27dd0 SHA-1: 96781942e058130e771615d04151a3d3438f0c54 SHA-256: e5e2957a2c6fb89c081479faddd514ee65ce68dc9bac65c8146d7dbfcdd9b04c
96 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to mislead users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is intended for malicious purposes, likely to direct users to harmful content or phishing sites. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://seamcc.com/UserFiles/files/jilovirox.pdf In PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb86e661bf---virajunorokasewegegiwo.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/24219327778.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/foludunozozuvidezugariku.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/lipun.pdfIn PDF document text
    • https://mszukam.pl/dat//file/5260416225.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611796dd4d984---52869848935.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cdb23dcab---rimimewavefewi.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/41902035407.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac09eb4623d---lobefisekufowefesorilib.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/okjfg57bbn4s1aint2tbfo2l7f/robapurexalid.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/kaxebaxolimuzatotasut.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bbe63619c---fevopatozigajep.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/35078260926.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607256277b383---xefududerexinatatoto.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102d5af9e5e8---loketubima.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/m4e93p9tvk5crmmiej11lbtm87/pimazetebexaxuxarosowinim.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/99821882537.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf9cf94164---48306763659.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/3214643598.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/xapixawelozimemivat.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/suxonozevawumona.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/rumitoxixesubik.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/tokej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+make+an+easy+origami+dragon+that+fliesPDF link annotation
    • 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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 11084 bytes
SHA-256: 77292fee3768cfd10e1ef4c5f44ed506b7c281ac4f5da0ac10121550185aeffb
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001160d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160D 17044 bytes
SHA-256: 2a5714eae8071d366b107afd53380597fb0b76dbe5e9398a301519ecc59df265

Open this report in the interactive analyzer, or submit your own file for analysis.