Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb6d6fd1b6bd2db…

MALICIOUS

PDF

80.7 KB Created: 2021-09-14 00:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3e1aeb9e3b02cc0860186e27acae68f SHA-1: fa8e4f7d366e4d7a6e776b82af976717531a20b1 SHA-256: beb6d6fd1b6bd2dbe863dca0b66bd2108a8c3ebcabb959ea66b1322c01f08ea4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URIs, including one pointing to a raw IP address, suggesting it's used to redirect users to potentially harmful content. The PDF structure and embedded URIs align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kowel.com/ckfinder/userfiles/files/1631004935.pdf In PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/duzomefajefemisa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321efbb0d5f---favetufulubesamofasono.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/42463463465.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/dinefalisa.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/wazapipejowuvud.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210905_155431.pdfPDF link annotation
    • http://www.anclupnapoli.it/userfiles/file/bewikel.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/39544745687.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0bf3acd2c---jawaronixud.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/63169680750.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/gorapuforarak.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/tusebejafukuxuvuli.pdfIn PDF document text
    • http://18554080.com/userfiles/file/serejafus.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-7/20210907040220733064.pdfIn PDF document text
    • http://hydrem.ru/images/file/nafaluwix.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/49235962969.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/18280478267.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/44847090473.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/30824694541.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/poroki.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/95927152826.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090112593170554.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/mudopifefegavut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=zootopia+full+movie+onlinePDF 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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 17428 bytes
SHA-256: f662eb188b73f8d4a86a77bba735b3f1ed97d6d234ff209831a677901a61026b
font_01_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 10380 bytes
SHA-256: ccb6b3fad98e95148ce514024bcdc2139d3cbee86da569170ab5d4e0afbd8695
font_02_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1