Malicious PDF — malware analysis report

Static analysis result for SHA-256 3186324db38f05e7…

MALICIOUS

PDF

77.6 KB Created: 2021-05-12 03:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fe781f23ff59f04053fe6b8c6fab7cf8 SHA-1: 373fd052e103a62ee871d1441bf3cef7ba3a6bf1 SHA-256: 3186324db38f05e7b4afeb5e0d311c7ff38a0f9af78e76062e84e2cdde92f4d2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=2008+jeep+wrangler+unlimited+x+soft+top'. This URL is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector strongly suggests an intent to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=2008+jeep+wrangler+unlimited+x+soft+top In PDF document text
    • https://luxederobidurip.weebly.com/uploads/1/3/4/6/134603039/70333bb90d15b.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/hbihwfw/idle_block_breaker.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/fPUXbL5/boss_fighter_2_hacked.pdfIn PDF document text
    • https://gawajofanobovap.weebly.com/uploads/1/3/5/2/135296378/d92f83c1491.pdfIn PDF document text
    • https://baduxobenef.weebly.com/uploads/1/3/0/7/130739850/jijosom.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/jdwnjcK/43025404549.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/ab3109d2518b.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/cUcjjei/41274032964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/venodiwepuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/70945818794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a70d82a-6fd9-4536-8c85-4f05ae94c683/narasimha_karumanchi_data_structures_and_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bytefence_license_key_2017_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33a8a14-b56a-4590-bfdf-d4bbc646756a/26378330655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05989f91-804f-4c9a-8c11-6f5d83f3a0fe/84044509335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dcdf2a-3df5-4bf2-9193-c9eff50fed7e/fekegezetef.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/fertilizers_and_chemicals_travancore_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/69371716798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97933380-c983-4b60-bdf8-a30ff55e86ed/62851870492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e52d1a7-9181-4add-8389-6639902799b7/shark_sonic_duo_reusable_cleanser_bottle.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/sawopemopomadinigemabuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c212ccef-03b2-45a7-a30d-d1ce68b09eae/15184151724.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 5972 bytes
SHA-256: 3d1ff6a2386a420b5a09fad137583dfdde5500b99b5c9a4def89d0dd1dd62171
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10580 bytes
SHA-256: dac7148a54f982f3243896dd2d444e5e3eebc168e13045acebf2306dc29beb70

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