Malicious PDF — malware analysis report

Static analysis result for SHA-256 49aca9a253447b80…

MALICIOUS

PDF

72.1 KB Created: 2021-03-19 03:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a8a6dc5a34398f33ee9f6eccddd6b255 SHA-1: c1909ebb31fd94e63df573f92d2f4b24876fecb2 SHA-256: 49aca9a253447b80877966b38e23630d9217e24d569959f7521e35716d6bf7c5
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=by+the+great+horn+spoon+novel+study+pdf PDF link annotation
    • https://cdn.sqhk.co/tosuwukiwate/Agihcig/lunokitatevorex.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/gecuyvW/baby_growth_percentile_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/0CAk5ih/nascar_driving_experience_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/hwmlEhh/30612944655.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/fhh6Sib/86662556076.pdfIn PDF document text
    • https://cdn.sqhk.co/wenisuvuroju/1gjQJgj/nivujurekagoraxap.pdfIn PDF document text
    • https://gibebisotasemig.weebly.com/uploads/1/3/1/3/131380024/7898061.pdfIn PDF document text
    • https://kuwepokipeluzil.weebly.com/uploads/1/3/0/9/130969114/disis.pdfIn PDF document text
    • http://gililofus.medianewsonline.com/16055771922.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufojigox/oSt9rh1/lapd_police_report_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidukimozefuz.rf.gd/delejowufu.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/85416223936.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/befukunovurifijeraziv.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_39d80b9dfbe34e65b5bb66a8b0ef0c83.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_218f9cd8799b4a19bd6863303c15a09b.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_0a28961468dd45e99aef07cdba83f7ff.pdf?index=trueIn PDF document text
    • http://zanawolusebil.epizy.com/islamorada_fishing_report.pdfIn PDF document text
    • http://xowipukidududuw.epizy.com/colace_davis_drug.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD910 5512 bytes
SHA-256: d45dea78e0529f93d8862603e06107ec4880044bc5441c8086d09c69c6f481ad
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10828 bytes
SHA-256: deda85b81e2746400290fa4dd39cbb9dc8bc657142834f05c493a09b847b1c82

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