Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e1ca2fb3e27d69…

MALICIOUS

PDF

72.8 KB Created: 2021-09-03 07:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 025396ce9d31966ae589ef2403256f1f SHA-1: 40a5185902817d72b77854d5486a35fea8d214ab SHA-256: 34e1ca2fb3e27d6998261fbece55271ba0e518745cb1f2fcead82adeecfa4d2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to various external URLs, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an intent to lead users to phishing sites or download further malicious content.

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://irlanc.ru/uplcv?utm_term=kingdom+marriage+participant+guide+pdf PDF link annotation
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/33556798028.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160abaa618666e---25189201190.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/semab.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1d31c12ac9b8047cbada10c0d8d6d8d4/jovoborew.pdfIn PDF document text
    • http://hnysft.com/d/files/radabizagosoza.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/jumizojotumuwezevururawo.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/zawipab.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/zakoradepudifeme.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0a003e97---javasulebixototudopim.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/kovagurekun.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/a39b7a82942337a071a1b680a3ba61ee/8481623825.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/32590448937.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/finomug.pdfIn PDF document text
    • https://castel.ro/userfiles/file/83754019240.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee627022485---99605872368.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/pilarenodorojuludefefep.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/dotuzo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf16a74577---32844099102.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/86099342093.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba6563e6b---lidowomisizalotuno.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/16569804883.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/22852770951.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/13085112881.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/lgn9pm4bqllchanu5llnjol636/lutodupekuw.pdfIn PDF document text
    • http://rayanchem.com/d/files/73281935758.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_off0000baeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEB 16196 bytes
SHA-256: 9ce333fe0f3ddcff205a07ea8af88cdf2b256f0c38926f5d8140675a8c1fed12
font_01_sfnt_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 10840 bytes
SHA-256: 7814cc1856ac90e334b91b9109829be4c0ef2b2d25fedf8a895d52e39abcc5d4
font_02_sfnt_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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