Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b304935b8e09db…

MALICIOUS

PDF

104.2 KB Created: 2021-04-05 13:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0048e9c674aa9b998d7f4a89dca7cfbb SHA-1: 96b1c068e0f99cd86829b97a1cfd7f579c82bbad SHA-256: 89b304935b8e09dbc05940f8b5ade2a01f3afd7b7d1dd9014646555c46fba119
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/award?keyword=beard+growth+tips+in+malayalam+pdf PDF link annotation
    • http://wimazufeb.iblogger.org/2011_hyundai_elantra_alarm_keeps_going_off.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_601f1e36740c9.pdfIn PDF document text
    • http://mogitumo.iblogger.org/46899275079.pdfIn PDF document text
    • http://ziwixan.iblogger.org/velosiraguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_604d1e0243999.pdfIn PDF document text
    • http://rigewojugofalas.iblogger.org/emergency_response_plan_for_industrial_action.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_6016f9d1264c1.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xisefowu/spotify_student_uk_sixth_form.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_0c8414573d964841af3abecc3b921d5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/funny_best_man_speech_template_free.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_319e61a4bc0c47cebf0a1e7f39029f45.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_8855595cd71543d7a76ed4efb20359ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/backus_naur_form_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/how_to_connect_lg_soundbar_to_roku_tv.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_c452174153c34d60b4afbda11ce1cfff.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_1d2f11e553044a44a94e3a078dfb2ff6.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_23395265f3894f27920623c080a588c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/gojikowoseg.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/android_auto_update_august_2019.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/guidelines_for_conducting_a_business_meeting.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/cacee_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/pigopowoji.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000112d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x112D3 34276 bytes
SHA-256: 16c8de9a7141557230d1ece707d095574a48ea2fc79b813edd4f9b1d07ad6109
font_00_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 5700 bytes
SHA-256: 709933e5b0422a5ce2ffea8182c80ea27ecf2f446958f3e5c0aacfa329b4c4e2
font_02_sfnt_off00016eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB3 9900 bytes
SHA-256: b239b15ec384186496774a9778153ad09eb9386afc760d10ae6bd9e49aeaa294

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