Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b562f04a3e9d8e5…

MALICIOUS

PDF

78.6 KB Created: 2021-09-08 20:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 28129a68876a9901be9e99159779ef5b SHA-1: a5136dcbe9e23911261ccc92eaae4174e1a14a18 SHA-256: 8b562f04a3e9d8e5dbc4009de4eee98d1aed07e4a725caf5ad866b65790ed7ad
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, including one pointing to an IP address, and is described as a link farm on disposable hosting. The presence of external URIs suggests an attempt to redirect users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=non+veg+samayal+kurippu+in+tamil+pdf PDF link annotation
    • http://elitsatodorova.com/uploadfiles/file/figixaseto.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/somenutumibuwevupotufidu.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/pevejusebijigoxurugige.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/mumutezaxikaguwif.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/76601637670.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/lapebis.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/jipopamita.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/juxejawerogozo.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/50631636718.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/saligisenutuzirigedekimi.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/monemelubamekawime.pdfIn PDF document text
    • https://cncunse.com/d/files/xawujoluvokudevow.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/loropofakuwajojadenesug.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/14488250873.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/zazovibatimujolufisuwel.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/zavukapirotajoxeko.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16136509247132---70753284087.pdfPDF link annotation
    • http://wksx.top/images/userfiles/file/sotipekazamubalesoruragaj.pdfIn PDF document text
    • http://boldogelet.hu/media/47517035888.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382d0e4f119---kukemarolamoruguvufizidex.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/50383440882.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2d4535fc0a80d04371b0322af9e6432d/noxavowilobatopegub.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090422213673499.pdfIn PDF document text
    • https://ms1oke.com/contents/files/bogasuvujatixavo.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/49177912485.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/sakuxaza.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_off0000c6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B4 20376 bytes
SHA-256: fa861857eac818991b4f1289eaeba64f2b5b4707e4ed79bb1016df2c649be666
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 11188 bytes
SHA-256: c4c2755a9d01e990f3fb76609f99bc848a906df39a7b29f401cdfb281482dcae
font_02_sfnt_off00011471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1