Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9672be3c917ad6…

MALICIOUS

PDF

78.2 KB Created: 2021-09-16 03:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9aaddde3b0a6064e622cbc6e107ddbcf SHA-1: 0a5b5248e20f8460df69f284ce6aa11eebc96e89 SHA-256: 1a9672be3c917ad647c6b2f46229b80d7fa57c0edc4f11a589cac06c59d5b986
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to obscure the final malicious destination. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://repare-ton-smartphone.com/userfiles/file/vamugeridus.pdf
    • http://pb-book.com/user_file/file/suluwidusemukitobilasa.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142745426488---rikilubexalifuworix.pdf
    • https://torgradio.ru/new/files/file/gizul.pdf
    • http://fukaofoods.tw/uploads/files/202109100033194184.pdf
    • http://enricobarraco.com/files/pivevawepiradix.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/nifiwilawivo.pdf
    • http://domki-kopalino.pl/pliki/72595220912.pdf
    • http://adimhukuk.com/resimler/files/muzewefujila.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/j2e74tlpb7tdmjmvoqksul2v7k/95887960598.pdf
    • https://terrebleue.org/userfiles/file/12439802718.pdf
    • http://ellissi.org/userfiles/files/mijefuneletaxewone.pdf
    • https://yar-net.ru/userfiles/file/lamudes.pdf
    • https://proetcontra.hu/userfiles/file/tibalep.pdf
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/50244769939.pdf
    • http://feminella.ro/upload/fck/wusav.pdf
    • http://oshcongregation.com/userfiles/file/sojoxajoluwivumawiturok.pdf
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/netuburuvenuluta.pdf
    • https://dunaweb.co/bg_image/files/kabinebexexatosapuminefen.pdf
    • http://lynxauto.ru/userfiles/file/vopexubamajololakada.pdf
    • https://wheelmartthailand.com/image/upload/File/zulugewires.pdf
    • https://mimpishiodua.com/contents/files/84642878638.pdf
    • https://travelone.ae/userfiles/files/kagonixikatufanagixud.pdf
    • http://bbfederico2.net/userfiles/file/vofonorimunoxusuziberemom.pdf
    • https://mamotato.ro/userfiles/file/82229447532.pdf
    • http://firegallery.ru/img/upload/kejavimatiwama.pdf
    • https://bonvoyageindia.in/ckfinder/userfiles/files/54850491544.pdf
    • http://onsijsselstein.nl/userfiles/files/92088707316.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+3+money+cheat+pc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf9e.bin
aff29f120ebfde99413569d0105fe26d4184588f55ebd71f7f6e6a1e08f678e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9E 16740 bytes
font_01_sfnt_off0000fad1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 16792 bytes
font_02_sfnt_off000112e8.bin
545ce1fcad582e67dbca215373b9be47479b1b6f7ee011316c3cf146a9fa6c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E8 10560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.