Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e67c4496d435c35…

MALICIOUS

PDF

84.7 KB Created: 2021-09-19 11:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f134fdfa824a544df7cfe9119b271d2e SHA-1: 5c324e94d0bdb6331e456c34fbb63694feca1112 SHA-256: 0e67c4496d435c351968b35d58d9162be684e59d2ac4dab7528abff368af0ed1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML detection strongly suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/zigetezepoxoza.pdf In PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/vazekiwinokipid.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/hud65mpcblpmoir7k5fl9of348/9609428038.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/9316764950.pdfIn PDF document text
    • http://punaide.com/userfiles/files/nagewagizezoko.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1630701136.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319f4747335---wofatipip.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/29966545706.pdfIn PDF document text
    • https://tcremich.lu/files/files/sivelixelani.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/fenesatumifemepisunowo.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/75643016632.pdfIn PDF document text
    • https://mlspoland.co/files/file/depisarizejol.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/lovob.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/39342714433.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/tawusipagugogasexodeb.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/46060887929.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/xulebunasusevejemere.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///mebusexixumeso.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/6492820718.pdfIn PDF document text
    • http://df-2.de/images/daten/file/latolu.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/91721178093.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/5951826602.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/67046482200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=among+us+in+geometry+dashPDF 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_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 22260 bytes
SHA-256: 360ed78d072f722464822feb9cd78f70d26b9c4cd3d96e9835ea355ea5c7ec31
font_01_sfnt_off0001145a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 10844 bytes
SHA-256: f97b48290f044b2aeb63389fed9bd3ab957f4f01012fa1f2983117d335b22a2b