Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf45660b11f1c3c7…

MALICIOUS

PDF

91.6 KB Created: 2021-07-25 02:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 07fcd964561288cf0c51a886d210704d SHA-1: 110ea27c9279da500d7253398d93086d173c66c5 SHA-256: bf45660b11f1c3c70b7314dcc6a9bce94b3290f711b66ddb33e78a5011c5f4f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users to phishing sites. The document body is heavily obfuscated and unreadable, indicating a deliberate attempt to conceal its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/98e0ca3bea6458d5ff6ca6e08af2d70f/fitikevililixutomuno.pdf In PDF document text
    • http://studiogallerani.it/userfiles/files/wagotuvozoposumof.pdfIn PDF document text
    • https://aokman-drive.com/d/files/kofeke.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5731ba51968448cea703e77ea3dbc351/23144083000.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5f68aee765f05f3d2e6d36fb37abece8/21671359179.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/junexavu.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/45846862252.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65a8066ebb---10547113879.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/qrkfqof39jq4647je907mc5j37/71110981711.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/24324746350.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/75243891629.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/94601789516.pdfIn PDF document text
    • http://sinoorchids.com/image/file/88270406203.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a521e3a1a3---lamukuzokugosiku.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/543623f78b081ca181e8c68461e7e869/jekitanapu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb399d977c7---2264936746.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abe8335747c---kinirosubikalelujizi.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/91101416284.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65e7f5303d---pelubebebujelurikiwewo.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfa77adad9---29159783739.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608d327cb0596---15037123002.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb630d885a8---litinuranidoduwot.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/59792202028.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lf1k7tvsj71uvopsjqtlgsbqq5/6000620703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+rhythm+of+poeme+electroniquePDF link annotation
    • 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_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 16600 bytes
SHA-256: 6c2ff7e6f8de566db3c06760e6a9763ffa4df7ccc01d294d2fcfde26c68e49fa
font_01_sfnt_off00012ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE7 11100 bytes
SHA-256: 4c33c52d72fde47e33283f497e154ab1a251ae7eab5d14bae9382ac4aba6cae8
font_02_sfnt_off000146a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1