Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb442ef6f89468d8…

MALICIOUS

PDF

81.9 KB Created: 2021-03-20 13:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1ec6f364cf3bcd41fa539f103c9f0cde SHA-1: 6674785e0b6b8406d08c5a7167cc3da340e8d4ff SHA-256: cb442ef6f89468d8a0c3f6c5e4ca7ebf6c23e6a22355d8c03d56b330720fd70d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ML classification and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to the embedded URI, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://xajibur.ru/strik?utm_term=why+does+the+raven+repeat+nevermore PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448328/normal_60443c3d8d02a.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/gcTsFhb/bitilivixobor.pdfIn PDF document text
    • http://trastenmyqort.online/zuwoxizomunijudapidi0r8s2.pdfIn PDF document text
    • http://basepati.22web.org/moon_river_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fd3a28d4d60c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448096/normal_60061dad8e189.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/md3xif8/sirojibenozukifir.pdfIn PDF document text
    • http://9gusevshop.website/femesumule2l2w2.pdfIn PDF document text
    • http://autobuff.xyz/sociologia_definicinxao3h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368991/normal_5fde06ef93826.pdfIn PDF document text
    • https://cdn.sqhk.co/weripewigi/jajchjY/fibivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_6029cfcc30a53.pdfIn PDF document text
    • http://gojemozuj.22web.org/what_are_the_similarities_and_differences_between_the_house_of_representatives_and_the_senate.pdfIn PDF document text
    • http://navalny.design/kedebedyw8xw.pdfIn PDF document text
    • http://kufexugofalar.iblogger.org/woromanulejabawokokarawe.pdfIn PDF document text
    • http://zoomita.space/962356208032nuhv.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/zobuwubedak/muxalo.pdfIn PDF document text
    • http://tivewigaviris.rf.gd/brown_skin_girl_wizkid_beyonce_song.pdfIn PDF document text
    • http://rukanaka.epizy.com/public_policy_rk_sapru_download.pdfIn PDF document text
    • http://vudalulok.rf.gd/tolaluwitoxor.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/wosipojejuvi.pdfIn PDF document text
    • http://fagaxasugomu.epizy.com/is_it_worth_to_learn_android_development.pdfIn PDF document text
    • http://figobob.rf.gd/18971030874.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/lux_support_guide_s9.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_off00010463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 5340 bytes
SHA-256: 7ea803e65702313e956eafde8dd438703a799ebf6e4163e7d3b85c576f4ccf6c
font_01_sfnt_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 10716 bytes
SHA-256: 103d1b6b7e2bf9bca0ad5acdf4d96451596b88f3cbca98ffb79b52b0f277a34d

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