Malicious PDF — malware analysis report

Static analysis result for SHA-256 e805452311a0c19a…

MALICIOUS

PDF

85.0 KB Created: 2021-09-07 00:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac46667b9c39426cbec25f0c6611f5b2 SHA-1: a1fb497517cd8f3200774e61fa13bea0a0a35701 SHA-256: e805452311a0c19aa41673e1ceec70959c83934919ec771cc6e1c9cddde64f1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of these links indicates an attempt to redirect users to malicious external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=afghan+calendar+1398+in+dari+pdf PDF link annotation
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/nejuzinutadojirusebogad.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/6875699ea6b07cc3c9aff152692dcd89/66005016377.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/zawatuvaju.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/672jedh3cv4ljpj94sn46io1es/9510748284.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///zutunefuropuvuvotikotojul.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/91002191382.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/45052336383.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/romov.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/72231199314.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf792846989---34492444931.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/kipenosogumu.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/2180306117.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/padopujatufijimisag.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/ruvonilerimejojof.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/dufis.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/56506542645.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bd2845161---59170284077.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612d2d459e640---benojupafuzamodetinujibur.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/8320601797.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070dbaf72ac9---zinekedavokob.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/sokexurokodeluzog.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609405e51bd9c---romuv.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/49378026639.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/niruz.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_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 23872 bytes
SHA-256: c26148350f467ceeffcf7d2d047c37b0777e82af109dcd23659d0ab513715abd
font_01_sfnt_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D16 11092 bytes
SHA-256: 33f62d25fcac7abbdd47b91f23d0afb2951ca2ab5bfa1b9027fa658abed90304

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