Malicious PDF — malware analysis report

Static analysis result for SHA-256 078464f141c90e69…

MALICIOUS

PDF

78.2 KB Created: 2021-05-14 06:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45b45959418dd41062abddc8148a4824 SHA-1: dceac1e8a018aadc92d8aea8d1a39e6953ba1d52 SHA-256: 078464f141c90e69766a4258b7e974c57849f241dc03ec8305d1446874f09fa2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://jumiwimov.ru/strik?utm_term=why+is+my+fitbit+charger+not+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452609/normal_604982ebf0157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388629/normal_6000afc85e04f.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/hcidgcL/prime_peaks_best_car_for_winter_games.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/75677526989.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/hNtLJje/preschool_teachers_salary_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/IgdhaZj/doorbird_chime_installation_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467561/normal_5feeb3c829b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_604d01ca1cda8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493916/normal_5fe59ab6952a0.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/ggggHjb/bikal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_602a5301ef74a.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/dNjazmB/84190540599.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/theoretical_and_empirical_literature_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_60247f1d5d7b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_e60d3d9465bd436e9308b03c76ba5248.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/foxuzuduwuzasozevugob.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/povajidebas.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/grade_8_math_algebra_worksheets.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/jesowunigut.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/labour_economics_questions_and_answers.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/to_the_moon_and_back_book.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_92fd3a673728430fa3830f6fcc6a0e7b.pdf?index=trueIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_ee214f12ac3d465d8c2b186b109a0a5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bojafazes/game_tekken_tag_tournament.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_d792d0ee7bd347d0afba86f6a0ae5253.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_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 5676 bytes
SHA-256: c95c2f0d54150c2ab09143de640fd85719867eb872405293ca57718aca107813
font_01_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 10920 bytes
SHA-256: 6838be911409fa1059ad3dd62ca3be091b2b5626d48fa28e6e307b8145d01f78

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