Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bd4feaabc8465b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 00:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f77ec0231c5dfa2b63ba29f97073d3a0 SHA-1: 5967594d57f999abc17fe7a9b3a6154365f3488c SHA-256: 67bd4feaabc8465b0cf747b567ecd8df2cd6597605d11897582a5fc136cb1b73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to numerous external PDF files. The presence of many distinct hosts and the use of UTM parameters suggest an attempt to obscure the ultimate destination and track user interactions, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://grandviewgroupresort.com/upload/files/nomiduk.pdf In PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/tixig.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/patowi.pdfIn PDF document text
    • http://askaudit.ru/price/delimovotebazizin.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e05cb8a3b---34138432041.pdfIn PDF document text
    • http://stroi-sistema.ru/img/bexumenivinubu.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/21720116268.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/12917897910.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/21598841584.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/58469182474.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-4/20210904154812184907.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-12/20210912134634330719.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/reseratudugar.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/rabisodu.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/55673245640.pdfIn PDF document text
    • https://binhvi.com/upload/files/20035445984.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/nofolusepukopefanaja.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/surirerapejafolapu.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/38731370399.pdfIn PDF document text
    • http://vititanon.com/user_img/files/74444285372.pdfIn PDF document text
    • https://norservis.info/files/files/26631660735.pdfIn PDF document text
    • http://generoussecurity.com/uploads/torexifipikepipatamiriwar.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/54935580992.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/kowizidagexigidikubonef.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/dodamigawusafibav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ti+89+para+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_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 18440 bytes
SHA-256: 0f242920b5cf71b86f155f06400da7fdf0cebd41cd66a185791ecb263db4c971
font_02_sfnt_off0001244b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244B 10280 bytes
SHA-256: 3a3805a419724330440a0e3fdf0650830e0de48d0b177fa1e388696fdd512388

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