Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a2a60f50fbf529…

MALICIOUS

PDF

80.5 KB Created: 2021-02-11 20:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d629d6eadc74acf0d787cea80c53ae05 SHA-1: 97d31f2c799aafc7de765147ae0ff09df3b4a6e1 SHA-256: b0a2a60f50fbf529fe654e2bf46b9370a17ab0b9b75b6eb69338fbc04caffa91
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=pes+2012+apk+uptodown PDF link annotation
    • http://wuwisometojone.66ghz.com/17084535440.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/jowijul-jozuwudawivusi-takabufibepised.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/diwaloj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_60177c9bd31db.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/cthcjfb/apk_de_empire_war_age_of_heroes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_6022a8ae20c0b.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/heWgi4K/aesthetic_painting_ideas_acrylic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451221/normal_5fde54ac8ead0.pdfIn PDF document text
    • http://fojozefamofu.22web.org/55048549671.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/ifhbHjc/yandex._kz_images_search_text.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/595661.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/bezorito/zabitegu.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/sad_shayri_song.pdfIn PDF document text
    • http://turomidujamo.epizy.com/bikini_bottom_genetics_incomplete_dominance_worksheet.pdfIn PDF document text
    • http://gajovab.epizy.com/wordscapes_answers_level_4026.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/android_snackbar_set_text_color.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/45950911182.pdfIn PDF document text
    • http://difiwawi.epizy.com/bafijisivuwage.pdfIn PDF document text
    • http://depewogidi.rf.gd/battlefield_4_ps3_guide.pdfIn PDF document text
    • http://ramejepazino.rf.gd/printable_star_template_large.pdfIn PDF document text
    • http://genovadeni.epizy.com/95783785085.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010d94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D94 22268 bytes
SHA-256: 9594ebcfb7a0c4b7c8ca941345d74eeb438717bfed90ddcd750b69596382673d
font_00_sfnt_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 5308 bytes
SHA-256: 200d2e5a59a013aacd30a8ba30d85e01ad1aa470a78e917fceefc17009479e64
font_01_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 10256 bytes
SHA-256: 992b112c4b3f443878cc0d000b644455125765aee074a53694ef5f95d739fffc

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