Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa52bd37f69a16a…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 23:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ce1de3b9e33c814e9c3477eae58cd718 SHA-1: cddab8fd1b990eeb1947f854d29c358da2407062 SHA-256: eaa52bd37f69a16a699d25bed64e7a180f675e0abce30420aef3136d2a6b5162
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites, including compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://accesoriosalmayor.com/images/userfiles/file/28808006621.pdf In PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16088759b8c786---21844245215.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/nutoganidukugawujojojoko.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf87c5c9183---65709651089.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/96724512622.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/98224733993.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/remawavak.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/01a6dec5a71d305ea8fd0a9088188303/51032453331.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/74398234643.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123b52dd8975---28777269973.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c61f72cf20---lomagezedapilizabi.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/tenutosisemasolasobemuv.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p0p0oks7h0qjokigae8tgfn6o1/46031031951.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/kofabanopelesur.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/tetejedagadu.pdfIn PDF document text
    • https://spacio.hk/attachment/file/38905498597.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/somosebulubokijedujisi.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/wofadomilovarefedaronuseg.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/mnsaruqgs1a5o9u6b7ohiddkjr/ketagalirira.pdfIn PDF document text
    • http://indel.sk/userfiles/file/ruxonopalozutomafaxim.pdfIn PDF document text
    • http://imoroz.by/upload/file/vavuwig.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/15188571402.pdfIn PDF document text
    • https://ntc-container.com/upload/files/derapulaxuj.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/84587732800.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc00ff51491---lunomadiburel.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161079850cc249---gekin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=algebraic+identities+for+class+9+worksheetPDF link annotation
    • http://irodori.kir.jp/files/file/5134455810.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_off0000e069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 11220 bytes
SHA-256: 2cceee3d3d190d7e5d74b6517c78a4c12c143a03012a2fb0da554da7a6eea91b
font_02_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 18368 bytes
SHA-256: 73cb99cf9c224405d71d85ce1e995f77731b061c74a78de83308d5e43fb16527