Malicious PDF — malware analysis report

Static analysis result for SHA-256 6887bc8211411433…

MALICIOUS

PDF

78.5 KB Created: 2021-09-19 20:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b03efd303c3661f21d074323ed3ea10d SHA-1: 5e7d6ecac85be141eec8958179baee912fadabb2 SHA-256: 6887bc821141143376dec7bfc8631bea65ddf33437613d4474814cc223b517ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are disguised with search term parameters, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to a link farm on disposable hosting, reinforcing the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=the+story+of+success+malcolm+gladwell+pdf
    • http://aardbeienfeesten.nl/uploadimages/files/pusot.pdf
    • http://wdnederland.nl/file/89724595945.pdf
    • https://es21sys.com/userfiles/file/90220757872.pdf
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/97882404406.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137547f8afe6---kolamaviwipapubu.pdf
    • http://cellesekorea.com/ckupload/files/30127529171.pdf
    • http://dsacare.com/admin/uploads/file/82840956122.pdf
    • https://horizontire.com/userfiles/file/48306753356.pdf
    • http://bacvietexpress.com/upload/userfiles/files/76241086662.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/92537066701.pdf
    • https://resttour.com/images/userfiles/files/49841828006.pdf
    • http://deltools.com/userfiles/file/mesuwidediwejifira.pdf
    • https://full-flavors.com/img/Data/file/21498717524.pdf
    • https://eltonltd.ru/sites/default/files/uploads/finupetebovanisukebex.pdf
    • http://pradakshinam.com/fck_uploads/file/diwukeri.pdf
    • http://jurabos.nl/include/editor/file/nerawo.pdf
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/74531657367.pdf
    • http://gdfsztal.com/uploadfile/files/gubunipojapekaninuwowizu.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/dd53e8c38fb0268651561ad2c1cf9929/gaxilepolow.pdf
    • http://kruengrangthai.com/files/files/kisurejaseselelikedut.pdf
    • https://farsiherbal.com/cache/fck_files/file/digezeligafuwobejuvez.pdf
    • http://palenice.net/obrazky_clanky/file/nelogukabitubefovomixaw.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_off0000cd8a.bin
2080a4ccd371614491e3a0c5f7a97359d98973531730f55a1fd2607b659a23a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8A 11136 bytes
font_01_sfnt_off0000e788.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 16792 bytes
font_02_sfnt_off0000ff9a.bin
e8de0c36bb23c86d8fbef926e3ee9a3e73a13f51c1186a7eacd38fbb85e21e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 17168 bytes

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