Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c6e1a83217b948…

MALICIOUS

PDF

83.8 KB Created: 2021-09-15 20:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a44947e65e8cc0fe8481ffb0b99168c SHA-1: 099a4980167bae08527e4492563720a96ecaaa3d SHA-256: 58c6e1a83217b948d42953fcfab39657e7a8851069e0b2440604ed1af1dd1c45
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm, and the embedded URLs point to numerous other PDF files hosted on potentially disposable domains. This suggests a campaign to distribute malware or engage in SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/rofiwefezaweb.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0901/6ccfa19f652b93f320d4be5fff584fc1.pdf
    • https://aqua2go.pl/galeria/file/13122332346.pdf
    • https://agmatbaa.com/upload/files/39494762691.pdf
    • http://ms-beauty.com/ckfinder/userfiles/files/meruvokapan.pdf
    • http://farashimirooz.com/files/2287113866.pdf
    • http://kleinschadenexpert.com/userfiles/file/govavev.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135875adda00---48658877956.pdf
    • http://cpgny.com/userfiles/files/26720558231.pdf
    • http://www.zdravotechnika.com/ckfinder/userfiles/files/tijelozobazajonepivejagu.pdf
    • https://amthanhanhsangchinhhang.vn/upload/files/zokolitelegitisi.pdf
    • https://mimpishio1.com/contents/files/tubuzakirolakesaregetub.pdf
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/45945519893.pdf
    • http://malir-naterac.info/UserFiles/File/zuvavisegutut.pdf
    • http://gandolfiarchitetti.com/userfiles/files/36689199028.pdf
    • http://bettaletroom.com/file_media/file_image/file/82369040965.pdf
    • https://ferdavagnar.is/images/fck/file/62664649607.pdf
    • http://ateliergermain.net/sites/default/files/file/41352991495.pdf
    • https://dom4m.lv/userfiles/files/wosezeron.pdf
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/ziwapepuxege.pdf
    • http://movitecnic.fr/ressource/site-image/files/97398534468.pdf
    • http://younewstoday.com/task/userimages/file/dotidazemidepumesoludaz.pdf
    • http://skulpt.in/admin/uploads/file/77461342375.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=android+export+sms+conversation
    • 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_off0000e12e.bin
f7ad513ae5f1a3575c1a0bd0516d1e294679913076ea4b7850cc261afa7539f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 18212 bytes
font_01_sfnt_off00011096.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 16792 bytes
font_02_sfnt_off000128ad.bin
10db48456e1bc45d9030a75e2d38e23517425d86c6064b5f8310ab5c7d6fc3e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128AD 10776 bytes

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