Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c5b9f6d212de9e…

MALICIOUS

PDF

86.5 KB Created: 2021-09-19 23:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e5f5e2ad4099a256813ef16d766ccd37 SHA-1: 73974c84eca62c2d6b65f35b098d05f3a78bde8d SHA-256: e2c5b9f6d212de9eb0dc4bbdd72a14bb1d6d1b5c3cb9a35e65ad406e159e98c2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, some pointing to raw IP addresses and others to compromised WordPress upload directories. These links likely serve as lures to phishing sites or downloaders for second-stage malware. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=kimetsu+no+yaiba+online+stream PDF link annotation
    • http://140.121.180.103/ckfinder/userfiles/files/24275586073.pdfPDF link annotation
    • http://fuyu.010bi.com/ckfinder/userfiles/files/40269936913.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/59691623348.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/76205770795.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/seteloned.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/dijopew.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6aacdcf56---65141093981.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/9578074197.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/jelirul.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/mewuxowu.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/3128823433.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/pexowovekutadejofasanux.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d0ac0f78c5a9696d2cae9d78207affca/wajobovub.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021918_145918_499.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d4d08c21deaf37c975707640324fc683/poreg.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/13799112802.pdfIn PDF document text
    • http://greenglobepms.com/uploads/karujunomob.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/65127527900.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/ruvorolifaxoga.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/612f61a8e7a90.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/46113386186.pdfIn PDF document text
    • http://konberdbio.com/upload/files/bilobumapuvaxunimefuta.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/jetanekexiriduluwuwexal.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/kelozuxerij.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/78752307105.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/7526396436.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_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 17592 bytes
SHA-256: e70894551180e58686e802ca10b09c2e20d3f92039cadcd56451a4ff8d27ac77
font_01_sfnt_off00011bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DA 10616 bytes
SHA-256: 3af2f03c81f2f1ac7fcf8087b9742a5e7f75680cab128053cfc4c22c3b64e550

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