Malicious PDF — malware analysis report

Static analysis result for SHA-256 d430b691fd165d0c…

MALICIOUS

PDF

91.0 KB Created: 2021-09-03 15:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1db11cda4cfbd9bc789a8f6f7bc3700d SHA-1: 400f5aac8f1a1a0ce7805e02860c74dfaac8a889 SHA-256: d430b691fd165d0ce3834c3777048eb6a9b687c237a6a28266ecdd5a249dddc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to redirect users to phishing or malicious content. The presence of multiple distinct hosts and a 'utm_term_redirector' heuristic suggests a deliberate effort to obscure the final destination and potentially improve search engine ranking for malicious lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=the+trade+war+between+us+and+china+pdf PDF link annotation
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bee82676b59---nowimegutunegexi.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/34133786220.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69753c9c25---8114314714.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/50819073637.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/85099551074.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/1274369402.pdfIn PDF document text
    • https://gazelletr.com/userfiles/files/jawurexojoganabife.pdfIn PDF document text
    • http://alltechsro.cz/files/gakanobebuf.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/jenodevotixepitewob.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdfd4bea08---34256240779.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/jagujexamolagawozebafepot.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/duwabiloxalawonegadapej.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210809_035246.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cbd4ecbb8---bonijo.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/0d0d1c2d64e2c39146ef411e962cfca9/wipofarumeposomo.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/84304407030.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612553976ca64---13717814963.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/71727438987.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2149856b7---17302714331.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/1e4bbdcd09622e650b9dccbd8e9a8402/97052494987.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/wipabo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093afc1d0e4c---gakopaxijobubesojir.pdfIn PDF document text
    • https://vestol.bg/files/file/sileki.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/lidepinutalikanegik.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9fd4dfe23---24186301152.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_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 19212 bytes
SHA-256: dbc8b0d215bcfac08626f4f3501df269e030b1dc927737bd9812a52e65bfa721
font_01_sfnt_off00012d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001451a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451A 10840 bytes
SHA-256: 208cba9aa8351393360d783205adf36d385890bc4345221cba9e41d431783fc7

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