Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ceab44a016568a7…

MALICIOUS

PDF

86.0 KB Created: 2021-09-14 03:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 86c02096642b305e86e4434990d1453c SHA-1: 869a8c35794980295a0fb27ad4a41f47b74c0e98 SHA-256: 5ceab44a016568a79cedde64f8d656aabcf40020d8a9aaba48c7f48557df72af
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one pointing to a raw IP address, indicating a potential attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://pattarasawat.com/ckfinder/userfiles/files/nusezojudikiwupu.pdf In PDF document text
    • http://kechengchem.com/upload/files/78650921015.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109112032558576.pdfIn PDF document text
    • http://splogservice.ru/content/file/85278899720.pdfIn PDF document text
    • http://df-2.de/images/daten/file/1494826142.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/63094306435.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/namulekijifitu.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/tupefupo.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133c9644e63a---85949126182.pdfIn PDF document text
    • http://emeat.ru/var/files/15719571861.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/fenugo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/sepobipiteb.pdfIn PDF document text
    • https://naves.cz/res/file/vufejotefelobefikit.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210904_142223.pdfPDF link annotation
    • http://uptownherndon.com/uploads/files/ritufamatuwidelawidil.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/28315502524.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/wibivitefujafipix.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/xomonijus.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/mowimofidutanebeva.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/25131705433.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/74866310544.pdfIn PDF document text
    • http://tiquital.com/documentos/file/63364998814.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/62325053036.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/93450652335.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/1944114838.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/52602361891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=k+seven+stories+2PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 18152 bytes
SHA-256: 7fa9702aa1f455d33935552d7bfd7bc7d610fd4d17ba314d7a4e075305b65643
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 10072 bytes
SHA-256: 26d450fee3ac5ca9708e152e8b9dfb7f5bb08fc0918beacd5815ba462fe76175
font_03_sfnt_off00013165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0