Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d597d049ee7d929…

MALICIOUS

PDF

71.2 KB Created: 2021-03-04 15:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 63523cea6cec4e0680feb645da036514 SHA-1: 6323991372d5dd2fcbb1d60bf196480b6d228765 SHA-256: 0d597d049ee7d9295ce259234db794a3aa6a9ea55cd49355e504054ed32d8620
126 Risk Score

Malware Insights

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

The PDF file contains obfuscated text that appears to be a lure related to changing a vacuum belt, directing users to a suspicious URL. Heuristics indicate the PDF is a link farm on disposable hosting, and a machine learning model and ClamAV flagged it as malicious. The embedded URL is likely used to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/123?utm_term=how+to+change+belt+on+bissell+proheat+essential PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411921/normal_601eebf57452b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5fd8b70d34267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5ffd0abc13870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fd66e1667882.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/2936b3f6ebf1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_60011e0697605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_60043fa298c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_602591e6dd62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_5fd85db078d82.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/wesasokunujilesi.pdfIn PDF document text
    • https://xudapugi.weebly.com/uploads/1/3/4/7/134702609/vezonixarig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tigufot.rf.gd/how_much_do_storyboard_artist_make.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/63283811219.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_7a7a9463c29d4e4dbd52b4c6657ef7cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonabafat/bazutatubewedoxawuwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/naruto_online_hack_tool.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_05b9789fb92d440facc7a4a182fe8de7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/pokipojazijanopanotonus.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_32c76775a542439381b8226ec26824ac.pdf?index=trueIn PDF document text
    • http://weragugu.rf.gd/zenonia_4_ranger_build.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/44608357585.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_319f9703f76849ffb54517562f77eec1.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_21c93ee469034feb8ae345d0328cffb6.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_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 5388 bytes
SHA-256: 20198903f48078e81c62b4adbccc3d726bf10d3fc9bec98325f794883a5309ad
font_01_sfnt_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 10688 bytes
SHA-256: 5520b3c0cb4a65a2b7d421b651128e2d340ea6399e1f1c8a3dd5aa23448c73d8

Open this report in the interactive analyzer, or submit your own file for analysis.