Malicious PDF — malware analysis report

Static analysis result for SHA-256 254723c9bae96743…

MALICIOUS

PDF

78.4 KB Created: 2021-02-16 08:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a3f2dbb34da13fa1b85f98dfa554427e SHA-1: 15827fc1965fcd47e137715b683e0adb6a017b6b SHA-256: 254723c9bae96743ec5438e1324bc5a97b12beaa5c175bd418c2f15d29f23b4a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded document body, though partially corrupted, contains text related to the ideal gas constant, likely a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=describe+how+the+ideal+gas+constant+r+is+defined In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fe9a6c75d181.pdfIn PDF document text
    • http://qqkaxes.xyz/exercicios_de_ingles_simple_present3s3z2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_601680f7918b0.pdfIn PDF document text
    • http://vovpomnim.ru/the_walking_dead_michonne_game_charactersnyvwc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467019/normal_5fe5d127e7b6d.pdfIn PDF document text
    • http://tvoyoproc.fun/54769491870dga6t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fd64ad07f527.pdfIn PDF document text
    • http://liko-sneakers.com/android_tv_box_x96_mini_firmware3zsje.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/8SPigjf/kimut.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/7jhgO8K/rts_project_contractors.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/jevedijadiki/56159607192.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/ac_market_apk_android_link.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/the_invitation_oriah_mountain_dreamer_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/6103068895.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/cover_letter_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/rang_barse_bheege_chunarwali_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/rezotutefujawajabisinopug.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 5

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_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5512 bytes
SHA-256: a4a1b94c31283872bff842e598e578726bc33a4593cc6199aeaa101991c29930
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 11632 bytes
SHA-256: a4dfa7dc1b7e699626762d8324503a582d648b56f182b181b577e95deb0308aa

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