Malicious PDF — malware analysis report

Static analysis result for SHA-256 4299735993ab1d85…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 00:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dca0fe9f0e8579c4e8de4180c69ade85 SHA-1: 9d54939b72895429dbc2fe74ff73aad9aa7cd812 SHA-256: 4299735993ab1d85776e27ebbdee5b422e4a6b3b268e240dbca4aae48359879e
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 0.9998

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 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://golowaki.ru/strik?utm_term=what+can+you+do+with+a+major+in+psychology+and+minor+in+sociology PDF link annotation
    • http://instacopyrighthelpteam.com/signing_naturally_7-_12mlog3.pdfIn PDF document text
    • http://e-sparks.ru/delivery_note_report_in_tally_erp_9o6i5m.pdfIn PDF document text
    • http://lnstagram-helping.live/les_contes_rouges_du_chat_perch_questionnaireabopw.pdfIn PDF document text
    • http://telgrm.site/microeconomics_theory_and_applications_with_calculus_4th_edition_free70sgf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_ef22c3bf422745f2bf06ae2772dfa59a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/kabivadavebijilizanejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf9a758-ea16-45fb-82da-53cb3816358d/81860082408.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/char_broil_performance_tru_infrared_3_burner_review.pdfIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_c9730fe000d44ad1b8cd0586bf13dbd9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/10681537168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7fc8388-e25d-49ca-b7e5-76431fa4f506/serge_lang_linear_algebra_3rd_edition_springer.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_57a0219eab15475ca46b8153987ce033.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/22069762545.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/almighty_god_idle_clicker_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/apache_office_suite_free.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_7df63971b2ff4bbb84c23a3c788bc6bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d590ce4a-1f4e-4d23-a5fa-3e639e1a39f6/how_to_make_ore_furniture_animal_crossing.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/calling_all_angels_jane_siberry_sheet_music.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_7eeb544dc13c4cdbb2569b5c76a0462d.pdf?index=trueIn 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_off0000ef97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF97 5768 bytes
SHA-256: f3b516a0ae32fc8bb570af099d22ceed1c63150396ce9f662c76843f78430cca
font_01_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 10728 bytes
SHA-256: 9929253bbb03e9d9eb133542474b649fcf8211129119b7c09fafca52de9d7866

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