Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d29940845d1879…

MALICIOUS

PDF

86.8 KB Created: 2021-11-11 19:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 521b5772e8d7e6953f3482fd6b352c65 SHA-1: 504de02eed00fc97f5161b6efe1f4af1a57e13db SHA-256: 01d29940845d18797ed66b12c6fc0b0130ca0ad1a9ffb6f8e757ceb4bb9201bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and the presence of external URIs point towards an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://vom-ragnaroek.de/uploads/file/luxujedinatawodasu.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3d4ae686d738f052b36954d901e07a59/tiwufezunanemepa.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/ladonabukizixo.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/lavasaripifote.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/44519574320.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/vebagufugurawowob.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/93751472992.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/tususoremi.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/83438339044.pdfIn PDF document text
    • https://actinq.nl/upload/file/73166050563.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/71984046611.pdfIn PDF document text
    • https://servicepapik.ro/files/vidix.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/gutuzadasijagegolone.pdfIn PDF document text
    • https://wrd13.com/force/file/tozizijuwerebubumure.pdfIn PDF document text
    • http://sz-frp.com/pic/20211102180028142.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/femenepofugilokuxatit.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/48188154632.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/navogamopefipif.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/vuwofetakepafavuxifofibu.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-26/20210926170631152397.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/bubisijijawisarupasigej.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/sakavututerudig.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/230eb4a087f3f485f2010a712634758b/71990512304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=cold+therapy+wim+hofPDF 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_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 10720 bytes
SHA-256: d7efdc16ee6f73085e61e22038e98f9caf6c04e08616e89fe3929b3424c60825
font_01_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 19368 bytes
SHA-256: 56b1f1750bb96784061cb83825e50bc142bb076edbedea7d7c7a97a2e616fd18
font_02_sfnt_off0001366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366A 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef

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