Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fa17cc5fc80222…

MALICIOUS

PDF

83.9 KB Created: 2021-09-23 22:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dbc0a6bea4fed32d01c7dbc1fddac7f6 SHA-1: 35d564d24ab4a69497d97fbf4a760dad24cd634c SHA-256: d0fa17cc5fc8022220602e7f6e211bafcc7775409280b078605b91af0cd0d535
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to potentially untrusted domains, suggesting a phishing or content-luring attack. The presence of 'Powershell V1.0' in the document body, although obfuscated, hints at potential execution of commands, possibly for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614034ed19738---napovofowobokosidulone.pdf In PDF document text
    • http://avsa.org/sites/default/files/images/files/2505331724.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/bizujujonep.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/donirofod.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/xikalerimosiromuzarujak.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614075f6d299b---gijexebeloxuwo.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/kiwulovatusujaluf.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/pimuxelewi.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/jugusozusokokanulijozixe.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/dojefogel.pdfIn PDF document text
    • https://ccskin.com/geektic/files/liwix.pdfIn PDF document text
    • https://nusantarabet4d2.com/contents/files/71912320986.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/sakenotaberaropafapisib.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202191002804046.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/10001224124.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/28438376512.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/54662513436.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/59065657491.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/dorigikize.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/puvimefulijub.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/51874157428.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xavenupalize.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/22127944569.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/50914188418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+install+android+app+in+windows+pc+without+any+emulatorPDF 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_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 19344 bytes
SHA-256: ec82e15a8c8d616ad89a28f281becb4310b197229708e196154e0160d1db3c4f
font_02_sfnt_off000127c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 11072 bytes
SHA-256: 0f1af8efe91024c709091d3e18a96e79e10b763ef824611547919fb657d25f13