Malicious PDF — malware analysis report

Static analysis result for SHA-256 e472c61254f29ba1…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 03:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0153b56ecdafc704c0c9e72991b45a91 SHA-1: 5c243fadc5ee847658d635138b61d97abe175bda SHA-256: e472c61254f29ba1b0ef5a91bdc01a93a5ede5add57b718dd78b0f59630e2e2b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://baarspo.ru/award?keyword=ffa+parliamentary+procedure+pdf PDF link annotation
    • http://5-euro.info/weed_eater_featherlite_xt2000lk50.pdfIn PDF document text
    • http://fishing-rods2.club/puripujunejolurijujaxer8njn8.pdfIn PDF document text
    • http://rotirir.mypressonline.com/gazalixesowezakejosevux.pdfIn PDF document text
    • http://natosabi.mygamesonline.org/free_online_mathematics_books.pdfIn PDF document text
    • http://espacecmb.xyz/wisegixamafefisaxainf26.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/ramosujqtvks.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/razofimusoguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_603168c73e4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_604d3b27e6fee.pdfIn PDF document text
    • http://zegiwire.sportsontheweb.net/vigerirukebanakesifob.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/malibu_300_watt_power_pack_troubleshooting.pdfIn PDF document text
    • http://raifaisentapp.online/lavender_blue_dilly_dilly_piano_sheeecjfq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5ffce48748329.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/26766308164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_6011246f0feb0.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
    • https://s3.amazonaws.com/lazesej/logical_mathematical_intelligence_questions_with_answers.pdfIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_19ce37ff91ff46c4bdd3d2683028591c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/8046474836.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/pimewarig.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/afara_e_frig_audio_song_free.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/anne_frank_powerpoint_prsentation.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/kenupigopubi.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/50652775214.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_5dddf7957e2348baa42fc002cd8e818f.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5e98c3efdc22473b99296d1e284aea54.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/mezofabavaxadexaxogukekit.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_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 5064 bytes
SHA-256: 111d8613de50945247273c899f28546792ccbd7013beb38e6c20746603fda504
font_01_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 10840 bytes
SHA-256: daab4aac8178db4a807d1635fbdc31fe6bde3bf59e276e908d6d51e75d040dc8
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34