Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba6195200aed6c2…

MALICIOUS

PDF

90.8 KB Created: 2021-10-12 00:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0fe6c8b9bf3d96be04a1ed0761cc6096 SHA-1: f932b91c58aabae9cab59f9860ea33fabd73480a SHA-256: 3ba6195200aed6c2ccae71dd8d14ce5ca489966a69ed173bce2a50eb5a28791b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be directing users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://synerhu.ru/uplcv?utm_term=pvp+texture+pack+for+minecraft+windows+10 PDF link annotation
    • http://ansonseatery.com/uploads/files/xuzewirapim.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/pemogeduzedutuxodejuv.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/41825196387.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/gusupavixujimawefar.pdfIn PDF document text
    • https://langumeistras.lt/i/File/83947105969.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20211006_62052077B88259C4.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/261317051312.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/dopenedapowife.pdfIn PDF document text
    • http://iphysiology.ru/upload/julaselaborefuvosuwotibir.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/39671774507.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c42502c9d7---losawedibebajo.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/24019080921.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/o80il9mcn4b2bvftirda3l4ho9/mejekatik.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161645716655dc---46759775077.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/31516883094.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/78417484029.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/85399709745.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/tonudix.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/8806189482.pdfIn PDF document text
    • http://packamate.com/userfiles/41191395688.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161394db305233---4399562975.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/25966574363.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613eae2503fb0---zurolepofoje.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/28031806554.pdfIn PDF document text
    • http://erfanekeshmiri.ir/userfiles/file/togeseluvun.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/3140392856.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/63926696640.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/14312599542.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_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 20316 bytes
SHA-256: 7ba8f8e6d812afb51dff6ea0585ccbe4717f2b2633e9ab201e983e8c09ebd749
font_01_sfnt_off000129dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F4 11356 bytes
SHA-256: 1d7c5f7a7f8ece4333e9d94ee264ce03a1513a792605d338bcaf9413a535f6b4

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