Malicious PDF — malware analysis report

Static analysis result for SHA-256 b085a25e54c7868d…

MALICIOUS

PDF

74.5 KB Created: 2021-02-20 00:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cffb7451dafa62fe72f1267bc2d3d9fb SHA-1: 74f105b4488819f67cb5fccc913b8311ca89ed02 SHA-256: b085a25e54c7868dc680c62e165bb571717df53b19d6c98839ede1976993e9e5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for manga content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/strik?utm_term=pokemon+adventures+manga+vol+2 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368952/normal_6004ad99449d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446161/normal_5fff621d17ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_6024f49c8c2bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5fe2256fcf81f.pdfIn PDF document text
    • http://adv-workshop.site/how_to_download_ti-83_calculatorf4auj.pdfIn PDF document text
    • http://detonic-hypertonie.website/alesis_dm10_pro_mkiiltc79.pdfIn PDF document text
    • http://idealica-italiauficiale.website/mifatonibixatotalosomysqpz.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/Aghiehd/muddy_heights_2_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5fdb786d262d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495059/normal_60018bd8ab052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6025cc6cd9dcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_5fcea59ae96c9.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/fIoghgc/15460271658.pdfIn PDF document text
    • http://qrettalq.online/grandparents_in_spanish_language0x59w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_6002fa8f61dc6.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/jei0tgj/tusoxivezugokine.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/PtibKoI/51042958938.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/lunojol/gif_photo_good_morning_video.pdfIn PDF document text
    • http://novosumagib.epizy.com/tejisifuperejodenel.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/aviary_photo_editor_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/40608197979.pdfIn PDF document text
    • http://jerananixakuzeb.epizy.com/zagaxike.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/gezexibevim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 4072 bytes
SHA-256: 3ebc730503cbf16b04e7a440c6a8fac5e657289091128d873abadbd02d087997
font_01_sfnt_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5404 bytes
SHA-256: b973acdd75b9590ad5e22d0bf791d659fc561fbf1ee15949d31334abec123556
font_02_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 11096 bytes
SHA-256: a03e985ae9119298df2620307a9618e71c1e114257a578b828c3c628b1437400

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