Malicious PDF — malware analysis report

Static analysis result for SHA-256 e381a2bb616c623a…

MALICIOUS

PDF

77.2 KB Created: 2021-06-18 06:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3f5e6a6eff15cd1c60c3593057949c2a SHA-1: aaf65143a93a16c7b7ecbceb0f0aeeef077fbdfd SHA-256: e381a2bb616c623a5566142f3937f2f9ca4168c1e56fb63f82cb1b798bd1a76e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating a high probability of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The embedded URLs and the structure of the document suggest an attempt to disguise malicious links as search results for popular media, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=tokyo+ghoul+season+2+ep+11+bg+sub PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nv7qle6svonc6j1iqfi56qedl4/mujalijuzegugadakine.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/risunoxumexumevoneju.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/12d1fcc5383e1047fce71ca8b5860ba5/jixozuko.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606e99efacad0---33807385228.pdfIn PDF document text
    • https://aokman-drive.com/d/files/lojazezekewimujenoz.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/81988350033.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96fe410dbf.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/70559031441.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/40507980723.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/71449366418.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/50825218323.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/49940237108.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/211133952.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/joxinu.pdfIn PDF document text
    • http://446888.top/userfiles/file/lofananime.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/059064b4d1ca6e72d99e650adac43643/bekoletogipum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 5424 bytes
SHA-256: f1a5674e8848c2045b07cceb8e32e5df084b44da9df11ffa0409e945f491dce8
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 11424 bytes
SHA-256: 9d131f03c457a9b12468c2693ca99db5b0a14ba51114023ff7e4433a102c0bb2

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