Malicious PDF — malware analysis report

Static analysis result for SHA-256 d575907136f05696…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 04:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3c8404d46f2401eae2ae024b98c6de95 SHA-1: 62db7546a1c4dcc1df5f6d58a61ac65f865b2288 SHA-256: d575907136f05696816c0aa7fb97e45aace469cc773a700d5e3802cc446a49c7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to suspicious domains that are likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links, potentially to deceive users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=install+ios+rom+on+android PDF link annotation
    • https://mytalk7.com/_UploadFile/Images/file/rutejuzibogekikiwa.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/dinutopewanegukimefetu.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/raguvexevewasadepetopiw.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/80957842530.pdfIn PDF document text
    • http://alltechsro.cz/files/19527611083.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/towejoguvigebirose.pdfIn PDF document text
    • http://anpo.vn/upload/files/tupijematefi.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/81844435679.pdfIn PDF document text
    • http://serting.eu/userfiles/files/28763633151.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/4556886937.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/51371136185.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/givipogovasasir.pdfIn PDF document text
    • https://norservis.com/files/files/duromedovutotosowabal.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210915214328455.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/puvigixi.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ko86nqpb2iq2no6c75ifgtmkn6/dolifovuwasesutujet.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/padofuruka.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/c15ntdo0lt3eckmoo5uh9chro2/62912549646.pdfIn PDF document text
    • http://ping-property.com/user_img/files/gijisarofabogigivuw.pdfIn PDF document text
    • https://b2cdemo.tickets.com/content/files/doxexaguradeg.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_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 17696 bytes
SHA-256: 9956feb4f0f116c0b369f46f6edbbfeb7e7792d356db0fcf006eac1793d0a0d1
font_01_sfnt_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC4 10228 bytes
SHA-256: 03c771df7f3d4915ff3b48816c0c7d5d4f9579ae789ec123b45b6d0df99ce15a

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