Malicious PDF — malware analysis report

Static analysis result for SHA-256 864b2ce7b9b705b7…

MALICIOUS

PDF

69.5 KB Created: 2021-04-06 12:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f47f15449a878ca31269fd4452507020 SHA-1: 2340e4f4e97c8f322fdc0f2605a66ecd76cd7714 SHA-256: 864b2ce7b9b705b7ed3ae3c190e6635bb8c1560d41830dad56b07640e1ee8189
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=bahtsul+masail+fiqh+pdf PDF link annotation
    • http://zaliv2k20wowowowoow.xyz/the_sims_mobile_vs_freeplayh3f17.pdfIn PDF document text
    • http://reassurez-moi-fr.info/sadlier_vocabulary_workshop_level_b_answers_unit_4rgaox.pdfIn PDF document text
    • http://lolibixavug.22web.org/karyotyping_computer_activity_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5ffc359a9791d.pdfIn PDF document text
    • http://clientesdkb.com/past_tense_worksheet_ks2nz446.pdfIn PDF document text
    • http://hookup153.fun/the_legend_of_the_cherokee_rose_poemurqc5.pdfIn PDF document text
    • https://wubudebekezame.weebly.com/uploads/1/3/0/7/130740051/kumuzugik_wajafizik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5ffa965106e2a.pdfIn PDF document text
    • https://mafeguviwu.weebly.com/uploads/1/3/1/4/131407057/mivimipuwodemo_gorowudonux_puzutivakukaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_60511c756c97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_60462392b8bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_6027904465b52.pdfIn PDF document text
    • http://nububezobuto.22web.org/firefox_for_linux_offline_installer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikumomono.rf.gd/17786429067.pdfIn PDF document text
    • http://gamofamixor.epizy.com/kitab_barencong.pdfIn PDF document text
    • http://botawaxugeb.epizy.com/how_do_i_change_the_size_of_a_dymo_label.pdfIn PDF document text
    • http://zuvemodu.rf.gd/xaxep.pdfIn PDF document text
    • http://vodirid.epizy.com/ridadosodexuvulesorawogol.pdfIn PDF document text
    • http://rilevoka.rf.gd/zewazotabali.pdfIn PDF document text
    • http://jidoxib.rf.gd/transformers_prime_operation_bumblebee_part_2.pdfIn PDF document text
    • http://sanonusujinuz.rf.gd/raliwuvekenabifuzijaf.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_off0000d0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E0 5360 bytes
SHA-256: 122f2fa4fcc457df5304d0241cfe8e008b7bf4a3df28d51aeed96cda4bd582d0
font_01_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 10768 bytes
SHA-256: 52f6d451aeddfaeeb0aa86967caaa54dd4e3eaa0fc60c8f36c308b8f4e22b524

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