Malicious PDF — malware analysis report

Static analysis result for SHA-256 5058ade7c24d9279…

MALICIOUS

PDF

86.4 KB Created: 2021-09-17 03:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b02aaf59a84e33e2c6de8776eded2bc4 SHA-1: 01607812b9449a685569353bf0c7f8be30771ad0 SHA-256: 5058ade7c24d9279f561a948628f70b1e62b316a8300e77fe991a7575ce04db2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=android+game+play+on+pc+app+download PDF link annotation
    • https://maisonforville.be/documents/file/17036650209.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109032102024093.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/46368929331.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/71872677055.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/68928716131.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/dekewupot.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/vuvibevobugokekoxufo.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/pizixojefogubegok.pdfIn PDF document text
    • http://www.centralperdana.com/file/lunuperokuvof.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/pipolamezizegu.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/32350371708.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/42740023396.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/xoxivarureju.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/jasatokibakexonufoxagikaj.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/11627395239.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141369791b13---42546805726.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/xupelaxa.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/sekabakoluduxunijonapim.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/70034253268.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/44379298886.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8d140906042069133a7cf8135481dab3/lowatafa.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ab94de915fe3a5b4b5df2f2dd7d4e08/9192230144.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16143d9b8c9e96---jifixixudaditiwasami.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_off0000ee00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 17460 bytes
SHA-256: f8926bbe619fb2d41f5b54ee0b85e592ee63327feb42cf48d6f82d992844b99d
font_01_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EF 10772 bytes
SHA-256: 7746a6352a6dfa9be788c608b1e3585ea58a2fc90ffaaa0faae77907751f6cbc