Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fde4e1154134fb9…

MALICIOUS

PDF

76.1 KB Created: 2021-03-31 03:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ba359c3d46f3adb7f8154d0a6ef4e519 SHA-1: 57ba30f8c7c98d77ab60fb273e08b028709d410d SHA-256: 7fde4e1154134fb92034af88670936e87f88b83c4bfbc8abbaca122961911681
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary lure pointing to 'gimoguvi.ru' disguised as a Bollywood movie download. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The ML classifier also flagged it with high confidence, suggesting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=hd+bollywood+movies+new+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459776/normal_604fd09e6714e.pdfIn PDF document text
    • http://shopsupergood.site/meditacion_guiadatemqa.pdfIn PDF document text
    • http://edevletorg.com/247620231427sce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6015a931a6c4f.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/natudevixitop_giviputij_bakididar.pdfIn PDF document text
    • http://front-glass.website/swot_analysis_of_nokia_phonetix8s.pdfIn PDF document text
    • https://rinavotonig.weebly.com/uploads/1/3/4/4/134477757/eeb846a.pdfIn PDF document text
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/wupewebit.pdfIn PDF document text
    • https://dugepawegozil.weebly.com/uploads/1/3/1/6/131606694/393ab1aff1218b2.pdfIn PDF document text
    • http://sekizabugurewud.iblogger.org/bannari_amman_photos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485695/normal_605a1e9d2e272.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/buratofemu-xugur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaviwewateliwi.epizy.com/fikejakudakajawitazuwapo.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_1d1e6b4061c64d2581e6cc5887b39ae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/98096597048.pdfIn PDF document text
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_859f58aeed3c4a15ae8cf73f78b4a2a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/bengali_calendar_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/kirby_clash_guide.pdfIn PDF document text
    • http://koluriv.rf.gd/litotebevawo.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/3143098155.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/briggs_and_stratton_625ex_parts.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_6bdf6bf7b88547478bf932d26a0cf2bd.pdf?index=trueIn 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_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5200 bytes
SHA-256: cdfd5c1a1fe0848f92ef81999b38b3093533332534562864c7eac8f37884ef89
font_01_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 10856 bytes
SHA-256: 58d132d567b56a032c1a710b736294bb6802a3ea1c0a7c0c1578cad4548bcf7a

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