Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae26e6868a71c5ab…

MALICIOUS

PDF

76.7 KB Created: 2021-09-16 04:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 95941d1634d3c6c36eeaa13dbcef2c55 SHA-1: 46a0e8ae446ae402a87482e45df31252ebc33798 SHA-256: ae26e6868a71c5ab65dd7d5172ebeadb53e914a15c680841755085d7caf59763
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document is used to distribute malicious links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/86968406917.pdf In PDF document text
    • http://cukorbetegshop.hu/files/79034557719.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429a247d9eb---zetagolegos.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/juvafekedetudanabu.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/ravajudidasebidozanelerow.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/32675451464.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/sipadazatavujenerosol.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/50084150739.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///gekimututot.pdfIn PDF document text
    • http://bronia.org/userfiles/file/20734389153.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/pumopelurajizudaxod.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/54973516044.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///77726842352.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/47451892023.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/68275607049.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/97616951548.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/kugorubow.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/20817935256.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/senalalajunupisavalixun.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/pemiwuzemigekadupaminisum.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/tetonalaxakazetisujekub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=farming+simulator+15+android+download+freePDF 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_off0000c715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC715 11048 bytes
SHA-256: e6b332dc078ea638e17fcee0fa43ae1afb8123907c87b06174f3aa52289bed3b
font_01_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 17116 bytes
SHA-256: bb27ad2fbd77c7b2a7016c66e0c5a941068ab0860a82c51d846b1a85928a5db2

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