Malicious PDF — malware analysis report

Static analysis result for SHA-256 1486d91b123fa1f5…

MALICIOUS

PDF

77.2 KB Created: 2021-02-15 22:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1efff5ed7f5712d866a900667ca31361 SHA-1: 04f0a1bc07e7ae2927bf1ed8c20d1883411cb48b SHA-256: 1486d91b123fa1f542fddcdf90e4ea8bc535d27f52e989dfd88bbb93722e5942
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate this PDF is designed as a link farm on disposable hosting, likely to phish for user credentials or direct them to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

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/123?utm_term=how+much+should+i+pay+for+a+used+riding+lawn+mower In PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/b7c1023e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_5fefca484a15a.pdfIn PDF document text
    • http://fruitik.space/gezuvajupofixilpxawa.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/hhFVhe8/12676235288.pdfIn PDF document text
    • http://pestore.pro/jagatatalaloxudegio18qs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449402/normal_6002c18b1711f.pdfIn PDF document text
    • http://ttttrrrr.space/xaretukatarajofaxurijeliki8z1r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_600a8dcea090a.pdfIn PDF document text
    • http://vuxokiwi.22web.org/mosexukotodapewajonadug.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jejazeA/nadumijejarorugupip.pdfIn PDF document text
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/ranogor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_60086bd4861fb.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/jc1jihe/teacher_appreciation_gift_letter_to_parents.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://dufuvebali.rf.gd/how_to_perform_multivariate_analysis_in_excel.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/report_dangerous_driving_uk.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 5724 bytes
SHA-256: 1f3ef56d213985078a58f17c2a4458a688fc0850bf5555a129133916eb30520c
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 6124 bytes
SHA-256: b388dbe1581020506c7ae236760a4eb831b5776da7a7f06160d2be54530fa78e
font_02_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 10364 bytes
SHA-256: c7d0c8eac3725a12cdf49eb74af64cea898f82db01992b1eaf3b089c4c233931

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