Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff14b61710a7dbc…

MALICIOUS

PDF

79.7 KB Created: 2021-09-22 15:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a6843079eab46039223b74daedfabc3 SHA-1: ff8c5b7b0050530d9bdfb3210199f09a90e1625a SHA-256: 7ff14b61710a7dbc1ea1568207844263201b15970feba9b8e646efca36cbab49
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thietbiotoviet.com/Images_upload/files/pixolivisotosifuxa.pdf
    • https://guanlai.tw/uploads/files/202109110535035333.pdf
    • https://hoalavender.net/upload/files/92431436845.pdf
    • http://artc-polymers.com/upload/images/files/rijunidizez.pdf
    • https://noble-program.site/js/ckfinder/userfiles/files/50275938359.pdf
    • http://pharmabiosolutions.com/filespath/files/20210910014817.pdf
    • https://hchoanglong.vn/userfiles/file/ramixukawawisewurixo.pdf
    • http://www.mustwalge.ee/data/content/files/65988479794.pdf
    • http://ruihuitax.com/files/file/vodaxe.pdf
    • http://erainbowrealty.com/userfiles/file/23556212192.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/3bc4slh6a4902lhqkovaef70se/89062129109.pdf
    • https://smilaxlabs.com/userfiles/files/repunudotamufida.pdf
    • http://gangwonbnb.com/FileData/ckfinder/files/20210905_3A90E9560B76F0A5.pdf
    • https://tradingcall.in/ckfinder/userfiles/files/gavukufudiwipapalew.pdf
    • http://clinicaveterinariagoitese.it/userfiles/files/96260399673.pdf
    • http://ivelinabozilova.com/userfiles/file/mirorerenesazerogafix.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/mebogelezipiwedovovi.pdf
    • https://aventura-agence.lu/userfiles/files/xunibozelidulozulipe.pdf
    • https://pepinieramontana.ro/ckfinder/userfiles/files/pegimutokopozit.pdf
    • https://trexanh.net/upload/files/93056903044.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1162639cbcdd49a1afec9abef09d8138/sagitula.pdf
    • http://www.aportecnica.com/imagenes/editor/file/refesaxapojuzagel.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+see+who+views+your+instagram+posts
    • https://rt9.rspo.org/ckfinder/userfiles/files/moserutulexakonog.pdf
    • 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_off0000d236.bin
5b7c3fb9f03b3a938584193d6a75b6d9a376c875608f1eac8aa36161c4a10c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 17416 bytes
font_01_sfnt_off0000ffac.bin
dd6d06aad898adc07ba9ac3a0b53986bcd58e137d4aafb6228d6f91d2387f73b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 11008 bytes
font_02_sfnt_off00011931.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 16792 bytes

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