Malicious PDF — malware analysis report

Static analysis result for SHA-256 9674ff2fb0e3c157…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 21:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45ed79608d73dc64da09e75fba7d36cb SHA-1: 3eeea1898ae7cacf1ef8cdd994b1c668e8355a7e SHA-256: 9674ff2fb0e3c1573c311ce2bf9eed65e23e046f3b522a38cee1a9e661cce415
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=being+aware+of+oneself PDF link annotation
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e07d69cd06---10275429390.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e358404ac---496222436.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160812da299719---salawojigusomimoluliwotip.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/tc4vua40qj1tanc9e6h5lbc9q9/ratago.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1d64fdc0f0838aac609ab65173043e83/jetobovanoretiwijazoz.pdfIn PDF document text
    • http://goref.ru/files/file/fujibem.pdfIn PDF document text
    • http://teplospectr.ru/images/files/61433249139.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/73507959779.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/gavixopanelu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607260bf02837---2519078588.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/bbc2445b7f95b4abc30a3494fb884ec9/devazafukisipadosiwuboxot.pdfIn PDF document text
    • http://coffee33.ru/archive/file/28922486837.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/pigudefevin.pdfIn PDF document text
    • https://krossi.ru/images/content/files/55880875022.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/jegosu.pdfIn PDF document text
    • http://brenderup.ro/mm/file/pegisajefabusima.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/73222768102.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/nv5b2o8kihf5c1vnfhqq09g4n3/45827626571.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1764d07f07---67536302642.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/464291569.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bb87cb8bc73c47d3dddd987bc908aa00/rudodalekorikirezamom.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a1754b351---35735425657.pdfIn PDF document text
    • http://iphysiology.ru/upload/35415030074.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/dunukedexerixevudeb.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_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 10432 bytes
SHA-256: a3ddc2c54ba9f8f28b414ea01957139903510d82fbb142faba6375a6c38cf3d1
font_01_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 18344 bytes
SHA-256: 32b504b96e027640180c9b25818fd84db2a67b5c42291f688fbc60a27486e3c3
font_02_sfnt_off00012c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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