Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4db387a033eee1…

MALICIOUS

PDF

72.8 KB Created: 2021-02-24 03:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b0d3be9001272186734530816af0c077 SHA-1: 32148cf9aa4be6a0c121abed91c469e885780767 SHA-256: 4d4db387a033eee137aa94d4b5884cddd90ce991e93f32d4e3c15849052b5309
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by multiple heuristics and a machine learning model, indicating it is a phishing or redirector attempt. The document body, though partially obfuscated, suggests a lure related to lawn care, but the primary malicious activity stems from the numerous embedded links pointing to disposable hosting domains, likely serving as a link farm to distribute further malicious content or phish for information. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/strik?utm_term=how+to+use+a+broadcast+lawn+spreader In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5ff30a3d8a3f2.pdfIn PDF document text
    • http://tipografiyav.moscow/adobe_illustrator_cc_2017_skills_tes9yi4w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fe666684be8d.pdfIn PDF document text
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/c31c66308e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5ffc617a71030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485014/normal_5fcd2711a5794.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/xn0jfjf/red_balloon_saloon_southfield_mi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jodewejuwuw.epizy.com/convert_to_word_nitro_pro.pdfIn PDF document text
    • http://nivuzujele.epizy.com/pejovoguze.pdfIn PDF document text
    • http://ruxusanufip.rf.gd/free_cash_flow_example.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_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5260 bytes
SHA-256: c6fd0c6b586a916237346a56c30d94d19e492dd46f29c819f6fb3a355a5b8164
font_01_sfnt_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 9900 bytes
SHA-256: c9b65e37e897f886b6af0ceea90728c17e7a1478d1d7280674320868ffdab1af

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