Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f1cbdb3ff8cc23…

MALICIOUS

PDF

97.0 KB Created: 2021-03-21 00:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 53df33e87b0e5b10a571faa43d616e90 SHA-1: fa926a495d4846727db090ca40ba308908f385f8 SHA-256: c7f1cbdb3ff8cc236abab13156233cc307a16b69590f6db9ef67ed5129db889f
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to a phishing page or download further malware. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

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://ponafet.ru/strik?utm_term=why+is+printer+not+printing+black+ink PDF link annotation
    • http://supermagazforsale1.xyz/fire_protection_sprinkler_system_design_guidesafyq.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/4he6ZtW/tell_me_about_yourself_sample_answer_quora.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/gzijjAA/men_s_hairstyle_medium_length_2017.pdfIn PDF document text
    • http://gta-msk.ru/marifosidordlyb.pdfIn PDF document text
    • http://littlenat.space/coin_master_free_spins_android5w63a.pdfIn PDF document text
    • https://cdn.sqhk.co/noretokujazo/0if6dji/m64_emulator_apk.pdfIn PDF document text
    • http://kinoxca.xyz/pagels_gnostic_gospelsdbhn1.pdfIn PDF document text
    • http://allerop.xyz/rosezodafuponavexedurboebw.pdfIn PDF document text
    • http://vinorama.fun/homeostasis_worksheet_pearland_isd_answersk6z02.pdfIn PDF document text
    • http://onlinesos.tech/washing_guide_symbols_ukc2e4i.pdfIn PDF document text
    • http://dutusejutax.22web.org/xenutozazo.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/gg44khc/jetukudejukulina.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/TidgfIU/best_music_player_for_iphone_11_pro_max.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wuwusawoviwu.rf.gd/current_cpr_guidelines_2017_uk.pdfIn PDF document text
    • http://gerikopowabog.epizy.com/16307656091.pdfIn PDF document text
    • http://rukodulaban.epizy.com/2701040538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee37e7a4-013c-4bf9-b15a-43c14b1fddac/tetinoduvorurapidovajimux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950789b2-5900-4d52-8587-339fb5127b75/around_the_world_in_80_days_cartoon_characters.pdfIn PDF document text
    • http://sibubixusa.epizy.com/67405328193.pdfIn PDF document text
    • http://denotepisijolib.rf.gd/twin_bed_sheet_set_with_comforter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a682b8e6-710d-4327-9e03-bbf3920c4a53/hec_hms_4.0_free_download.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_off00012fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 5300 bytes
SHA-256: e49e0b23b072cb8d3e8371a24ec6e6bf41788218e17a90e9cb98578819c36b97
font_01_sfnt_off000141cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CF 11320 bytes
SHA-256: b025b37097a20d39b36065f99e9ed2a2cb72deaf5f20f31df4ec1bae106fecd0
font_02_sfnt_off00016860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16860 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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