Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8720301b92028c…

MALICIOUS

PDF

82.6 KB Created: 2021-03-31 17:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f1869f3b5b5cf2f4694f9c9fae633584 SHA-1: 0ed723c291f357ff3263bf215a9351da4f8b3c20 SHA-256: ba8720301b92028c501f647c96f9d1428f212f91657eac966c74f1ed629d554c
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is part of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=how+do+you+write+a+copyright+page+for+a+self+published+book PDF link annotation
    • http://creditscoretracking.info/begavubamurenutegogsm6n.pdfIn PDF document text
    • http://7lessons.fun/68046293208pxlva.pdfIn PDF document text
    • http://topcreditcheck.info/linux_shell_programming_language260cp.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/lanoxana.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/83531580296.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/77370984636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fc731c13a924.pdfIn PDF document text
    • http://bluebadgeform.com/cbse_2018_date_sheet_class_12_commerceypapz.pdfIn PDF document text
    • http://dragonflysagewellness.com/android_update_for_sony_tablet_seg231.pdfIn PDF document text
    • http://fkpravo.ru/seiko_chronograph_100m_black_leatherf1bi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_604afca68d352.pdfIn PDF document text
    • http://shoes-storie.club/ways_of_the_world_textbook_chapter_10i04yo.pdfIn PDF document text
    • http://inertbhjbj.ru/83384301242zg4m0.pdfIn PDF document text
    • http://fherixq.com/91822397645nlsyg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizitibasowu.atwebpages.com/why_do_i_have_one_long_white_hair_on_my_face.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/hp_laserjet_p2035_printer_full_driver_download_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/toshiba_dvd_player_support.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/gomukovibewesetixevesanek.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/filme_a_muralha_2017_dublado.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_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 5776 bytes
SHA-256: 70970db3a4574eebb3f7270179e69c83f5d4b3c43d7778cc522192b0b2a5b2f1
font_01_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 11300 bytes
SHA-256: bb49c51de2e9f0d50a444325fd9d506fc02c613c1f89f02e3e16430853277c37

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