Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb8b4b3a4aee1f8…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 08:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a120036d7e9df1d7efc89786ee37d6a7 SHA-1: 74d39e3a4d67152e7a9b3d7d2fe1da360a0d27d1 SHA-256: abb8b4b3a4aee1f8f6d610133970bda2c597b8dafc5b5d091208ca063fe920ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised websites and potentially malicious content. The presence of multiple external URIs and link farms suggests an attempt to redirect users to phishing sites or download further malware.

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 https://cructi.ru/uplcv?utm_term=grand+theft+auto+san+andreas+for+ios PDF link annotation
    • http://isisthailand.org/file_media/file_image/file/92983707857.pdfIn PDF document text
    • http://synphabase.ch/upload/file/47550778349.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210909070724434396.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/7rinm7gl4rpol0tf8d5j1ep6hr/suvowoxedijevena.pdfIn PDF document text
    • https://greenways.at/userfiles/file/61423933646.pdfIn PDF document text
    • https://kenadong.com/contents/files/6826838327.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ccb286884---9510557436.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dfbf67984---pusiradosazazida.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5493155ea8c900ea50f802fa61a08b26/taletoxusodagokasevo.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/budexa.pdfIn PDF document text
    • https://norservis.cz/files/files/64438632270.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/itnjl9scsipaa0801hph55dos1/lugokomumufosomapux.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/rasewaxozelixorepabopik.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161338acc32603---xutasuwa.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/dopisan.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/povelonudifadaxurebowanos.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/52654082480.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/99161686045.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/vuxomemuka.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/96596167476.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d1222a44a---93853888260.pdfIn PDF document text
    • 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_off0000d1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FB 10544 bytes
SHA-256: 8a80bc2ce3f963834367fec0ef28ac956d7600b014628607bb933a767d8e4f4d
font_01_sfnt_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 17424 bytes
SHA-256: de0fae4711918e14dbc2f1d6adadd815be2d06dc6a67e32dc199e4f2c35c2046
font_02_sfnt_off0001160c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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