Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bb795fd06a45ce…

MALICIOUS

PDF

66.9 KB Created: 2021-02-26 05:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 331ebc9c791bbaa6c79f14d4b9dc6059 SHA-1: 667e60e72be709e16e1bfec3efa63dfc6eca0f83 SHA-256: 97bb795fd06a45ce1a9f3a0a319f750db2853f7ebec334dac814a088fe8ac9cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=5e+hooded+lantern PDF link annotation
    • http://13millions-warzone.store/yashoda_ka_nandlala_mp3_song_downloanmkc2.pdfIn PDF document text
    • http://masito.space/how_to_playing_guitar_for_beginners25wn3.pdfIn PDF document text
    • http://zoosalon.org/titojixolejvcdw.pdfIn PDF document text
    • http://monoga.space/j_river_media_centeroy2rz.pdfIn PDF document text
    • http://febanadedej.22web.org/runuratoxuwomorogirid.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/14998681240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388156/normal_5ff9fa6425214.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/69714678718855.pdfIn PDF document text
    • http://letxxnx.org/hachiman_god_complex3d9ri.pdfIn PDF document text
    • http://love-cosmetics.shop/lawug0zzsn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_601558c02d69f.pdfIn PDF document text
    • http://lnstagramsupportlives.com/9527208549214cpk.pdfIn PDF document text
    • http://closemaze.com/chippy_the_squirrel1zejl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disobaratid.rf.gd/alimentos_organicos.pdfIn PDF document text
    • http://bozetuv.rf.gd/welakuzojemulorexuxi.pdfIn PDF document text
    • http://liviwofuxa.epizy.com/moon_river_sheet_music_free.pdfIn PDF document text
    • http://bikaxubu.rf.gd/rowdy_baby_hd_video_free.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_off0000cd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1A 4764 bytes
SHA-256: 459cb9c547b59c0b5f1c5cff269c03a48e258f7254cfff0a1d9c799ac288fca8
font_01_sfnt_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 9940 bytes
SHA-256: 36bf227bd7a1d51eeafc596f43939aab9b2dbe52a62c121cfa6f6276d2b4cddf

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