Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5678527132714a…

MALICIOUS

PDF

89.5 KB Created: 2021-09-16 14:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f70a25bac64766373ad513b447b1488d SHA-1: 118255905495157ee364f9128107cb56eb94618f SHA-256: be5678527132714ac067f59208872580779b0678cec31f915ec5e4d575311ae1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external URIs pointing to potentially malicious domains and IP addresses, suggesting it's designed to redirect users to phishing sites or download further malware. The presence of embedded JavaScript, though not fully analyzed, further supports the malicious intent of executing harmful code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=mi+band+wear+os PDF link annotation
    • https://asoriofrio.org/ckfinder/userfiles/files/79074237296.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/xexavawam.pdfIn PDF document text
    • http://happy-land.hu/editor_up/wutozo.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613de1eac59d9---dexememupokokumiwewikulis.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/3206727077.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161341490a0b11---gabetubejudapuxuzopulu.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/3d176e88f7fae9387954cfd89ac9bf92/xufisasedaxadupu.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/grj521cp67fek4bpfrlcrhg1ft/79551397514.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/fisimiruwewa.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/32391953555.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/99265079450.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/jopebobojuvimive.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/segixepofepeb.pdfIn PDF document text
    • https://keongracun.org/contents/files/keputun.pdfIn PDF document text
    • https://bataretak.com/img/files/file/76422341838.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/lufodolezepewelupek.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/9480716356.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/16247013671.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16136910187afb---vifojinawodofojo.pdfPDF link annotation
    • https://hchoanglong.vn/userfiles/file/jetive.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/9978196822.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/jirotanukufudi.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_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 10316 bytes
SHA-256: c370448253f673733b223172a3e171ab290c1a69064eae2014a54c7c6c1a5fe4
font_02_sfnt_off000125d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 19416 bytes
SHA-256: 0ba4c369f56d1ae8c048fc6083b44b23911ec7109993e94120fbd32194513542