Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b02b1ed6c2bda42…

MALICIOUS

PDF

77.4 KB Created: 2021-09-22 15:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c2e9fc56c1f8172d78aea8b46c76668b SHA-1: 7ae256906401052fcbef39ca184747e6215354f4 SHA-256: 7b02b1ed6c2bda4296d33ac414fb3271e6e4023464d8c08373f3f1f135f72f7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, likely related to distributing further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kamionosnyelvlecke.hu/userfiles/file/gaxajaregixanixuzebali.pdf In PDF document text
    • http://aylabawadi.ae/userfiles/file/ladekobutivokax.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210911_8CF200A4DABAA68B.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/ranetutiz.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/kizifil.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wajebanikudofolod.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/botononasowubapal.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/83488543025.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/41533185852.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/doladog.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/77224936586.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16132edf07c6b7---73366573284.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210917_9EA0EB49BB5C7039.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a1aa11da---gizitetibinalidukulopu.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/75931224045.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/gevimeduzujoxukami.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/93382677613.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/923fc7febed4c03da35bbf112d8f376e/72041985309.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/26413241955.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/tipifidur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=chicken+royale+apkPDF 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_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 10440 bytes
SHA-256: 0ff18824c0a23fe5ad5d683a7f21a3932afcd350abff41865b5668a3adea97e8
font_01_sfnt_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 19188 bytes
SHA-256: f1812acd9eca6d954ec110467c49d98230718ef7f2ce7d2ba87df51c674c945a

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