Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b618d536356ae42…

MALICIOUS

PDF

90.8 KB Created: 2021-09-14 04:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f982b5a37ff5097c14a129bfe11fcbef SHA-1: 7d476f907b6093cb7cb71d5308e8fbcf593b1843 SHA-256: 9b618d536356ae424fdc0b644fbeb76baa0ea63668f74ae51c0e806aa563634e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://cwesp.biz/upload/file/wekukijuvuxotatozewixifev.pdf In PDF document text
    • http://manpukuorder.com/uploads/files/gepimegojex.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/85743954651.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109031418165232.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/200507005.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090116345228.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/nawiwomerebeju.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/79590119350.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/dasikemax.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/80640946289.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/92639368591.pdfIn PDF document text
    • http://samtekelektrik.com/files/95803729987.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/63180148675.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/72255254906.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210904074758_w1r9uc.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/9814994460.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/xedeti.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb83322b2b---lifodutigalebubasiro.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/riwazawopidawin.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/xajuxid.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/53837616046.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/pekuvemuxipirowom.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/jexugenitavoxisafa.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/kopaxixijopiti.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xakitib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=iphone+to+androidPDF 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_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10224 bytes
SHA-256: 810a2358b381e94322d98a7bb14dc8ab959723371d634cacaa2a81c899b9fa4a
font_01_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3B 18216 bytes
SHA-256: 4c6f6796ce46dbcfeab03db1c4dbcb9de09c625246422974f573d6e52bb59e6b

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