Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f5680c964b48a8…

MALICIOUS

PDF

73.4 KB Created: 2021-09-16 10:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38392368a0da439689d58447a6660243 SHA-1: 0e46e9e57025964a86482b1d266772a4c0c971c4 SHA-256: c0f5680c964b48a8dcd2a745483b73bdd754e7fd00fbdba221d2a21ba8ea152e
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with exploitation attempts, likely leading to the download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=st+michaels+church+belfield PDF link annotation
    • http://movitecnic.com/ressource/site-image/files/98350998131.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/36991763282.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/68023403514.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b53226f24450ce8eaa8644b8602e830d/2841732085.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/73ec2469fa043e39d919136a66dda157/57066586561.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/36261842233.pdfIn PDF document text
    • http://inphilong.com/upload/files/89776362632.pdfIn PDF document text
    • http://retailcop.ca/files/41256793414.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/buxojori.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/sojegoxexun.pdfIn PDF document text
    • https://okazionche.com/files/zovenexisifewedojowabu.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090210574299.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/81065605625.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210911004712.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/7703165298.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/2pt9k1ive5s3u1r6b51ijbm97o/samixib.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/gedavedoxiz.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/xovirinidapoxi.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/zenujetuxewiruvivow.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/banamawefixolufen.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/wolodiwu.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/getegosopolebadipedupabu.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/10321932638.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/78145145594.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_off0000bc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC11 16860 bytes
SHA-256: 621c0625db6b1ab0ecf3544d01cde7e0720bd192cab3b40aa0b66e4db410dc00
font_01_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 10832 bytes
SHA-256: 6cce765abda76b3701063680d1b30f7a4bf473c712e604b2025fecfe5c7a90e2