Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6311612d74977a…

MALICIOUS

PDF

91.4 KB Created: 2021-09-24 01:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f6c50a8d2c0de72ee2a5f2283d41f5e8 SHA-1: 8eeeae717f19428d459538258d1ca84a27d6cb3b SHA-256: ab6311612d74977a8387aa33f1031a665741a513b18b4c83f887bcb3f762432a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or redirection scheme to deliver a payload. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://actorconseil.com/files/file/bogopuse.pdf In PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/derikodigoperivokubup.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/guvoz.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7d0ddfe024736b2b0a975e75015599bf/3143131121.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/24399650214.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/43630235634.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/gituvevi.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/6943746717.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/wegipizaj.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/nolivemanuwenopujumebi.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/3995306542.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77881980156.pdfIn PDF document text
    • http://sun-eko.eu/files/file/6013546845.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/30751283023.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/40268544345.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/bonefefubaw.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/zurewojupediwotozetakale.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/dakavesepe.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/67503065599.pdfIn PDF document text
    • http://buonoantonio.it/userfiles/file/33145217205.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/94331221328.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • http://newcityhk.com/userfiles/fuzovozakuravobepupet.pdfIn PDF document text
    • https://crawfordpoint-ca.seeninherd.com/files/mifubazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cuevana+free+moviesPDF 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_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 17228 bytes
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a
font_01_sfnt_off0001308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A1 10428 bytes
SHA-256: 97bd72b8059d6e0ab277405ac0e5af137ac3f706d749d2046dcf75ffe8806242