Malicious PDF — malware analysis report

Static analysis result for SHA-256 daacd4e23707ca29…

MALICIOUS

PDF

82.6 KB Created: 2021-09-23 09:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f812cbf5d5cb90fce6552be0384afe63 SHA-1: e37d7427019c0dc7d3d6ac4131622c312d8ecb77 SHA-256: daacd4e23707ca29f1af38ffb4da331438cf38d46ed7443b8c498252e8f6d1bc
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic strongly suggests the document is designed to trick users into executing commands, potentially via PowerShell, as indicated by the MITRE technique T1059.001. The embedded URLs likely serve as download locations for further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://nomylo.ru/uplcv?utm_term=engineering+mode+android+apk PDF link annotation
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fd51063bc---kabozefikog.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/vezalomutem.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210916032346577.pdfIn PDF document text
    • https://506hlapeta.com/files/file/55028708955.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/19563255353.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/37309754265.pdfIn PDF document text
    • https://ms1oke.com/contents/files/biduw.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/kolanuxododebedav.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/midol.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/zavesuzixejekulapexezo.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/30171151150.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/22125173784.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9b74b3201---99712760015.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/96464273437.pdfIn PDF document text
    • http://budka39.ru/files/fudijepim.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/xurinevifizexizibenevedoz.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/18227538340.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/14715727109.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/gojerasoki.pdfIn PDF document text
    • http://apple888.vn/luutru/files/16718089472.pdfIn PDF document text
    • https://cubic.is/userfiles/file/84103296234.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/54598808201.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/televatujokoborasifejet.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/xejodavepivadodokerak.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/34317157363.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/99452873993.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_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 17748 bytes
SHA-256: 288710d23387af4349dfc40366505a9f808da59e3b4f4eecf0391a4d25a2937d
font_01_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 10500 bytes
SHA-256: fe7847031784d2a73ad3b7981ff31b2afdcaf07fec2a0f18bad87f0195580c1a
font_02_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1