Malicious PDF — malware analysis report

Static analysis result for SHA-256 97639d29d6152375…

MALICIOUS

PDF

80.4 KB Created: 2021-09-09 06:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5e59a04ebfd53f782991605c2adce43f SHA-1: bb98c46ef705ae87fcd895bd605fc10259a54581 SHA-256: 97639d29d61523752dd72243e3cc8c7ee74ea69e0a1bc6208864f7a06c5e9d84
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external URIs pointing to various domains, suggesting a link farm designed to redirect users. The PDF structure and embedded links indicate an attempt to lure users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=mp4+songs+free+download PDF link annotation
    • https://telewebmarketing.com/FCKeditor/file/6886201123.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/tesoxul.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/91509883324.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/sutadadewujodofeso.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090310200373499.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/v6ki54ev598cg163p3skhjrkh4/76719000133.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/bopunitinutatiwatewirafox.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135210656929---xidedilefa.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/pobogozibidawuv.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/18828428936.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/bofevof.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/72751387792.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/20721392102.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/38798771270.pdfIn PDF document text
    • http://kahasat.cz/data/file/vawepire.pdfIn PDF document text
    • https://12tiga.com/contents/files/70656434079.pdfIn PDF document text
    • http://fullx.net/files/gukamidixuboz.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/70278424427.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/detesabelilon.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/mopisemiwu.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/73713331899.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/83580008009.pdfIn PDF document text
    • 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_off0000d44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 18276 bytes
SHA-256: 27cdc5dcd4745798e4b65198b60ee749c7e8b686c3412269c4f21a257cc5b16d
font_01_sfnt_off0001034e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 10640 bytes
SHA-256: d130da510051c81db727d4657d70f2ea8e99df8bf2ea619bf1b510a64e20b27c
font_02_sfnt_off00011bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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