Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a65d14406e9601…

MALICIOUS

PDF

74.8 KB Created: 2021-02-25 06:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6368464a564ce7d5436fd629f79f12f3 SHA-1: 35563066bf56ff04948512549e9dc4dc1caa4821 SHA-256: 18a65d14406e96015141892c88bdb768bad2cf9ee5ba0f295a116b81d2bc0fc9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'how to repair pallet jack handle'. The presence of multiple links on disposable hosting and a critical heuristic firing for malicious redirector links strongly indicates a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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=how+to+repair+pallet+jack+handle In PDF document text
    • http://mikovil.mywebcommunity.org/zobewevoxisap.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/ankhsvn_visual_studio_2010.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/can_i_notarize_for_family_in_michigan.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/how_to_use_a_zojirushi_rice_cooker.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/wagijakabigejavow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_6035119d019e8.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/xurovanezuzulegawuzug.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/zinoji.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/20437208249.pdfIn PDF document text
    • https://ginimowawogob.weebly.com/uploads/1/3/4/7/134753870/96b9df673df3af.pdfIn PDF document text
    • http://experiment.website/387994738486q675.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/1527209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ff98748b4dda.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/8039093.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/stihl_bg_86_spark_arrestor_screen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mevomum.epizy.com/3741319838.pdfIn PDF document text
    • http://kiluwemejibe.rf.gd/62557142973.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD04 4964 bytes
SHA-256: f8249122d2ebd8cfd0e0cf063215bbf107f06817a5bd9c9e74f4d183cd633557
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 10020 bytes
SHA-256: 44a351f79ab94d39be4a9e57476d91a9d2f73b99c74b41569486bc630ab81bfd
font_02_sfnt_off00011037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11037 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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