Malicious PDF — malware analysis report

Static analysis result for SHA-256 963d49e4007d71a1…

MALICIOUS

PDF

91.0 KB Created: 2021-05-19 02:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f72ffb662955fbc523c5ed52345e9e12 SHA-1: 138ec337abc8c632b5be6c2ace35c3e47a2d92ba SHA-256: 963d49e4007d71a104b65373014044c174715b1171b89ef1afaba50bbfe7154d
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 0.9997

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://crophysi.ru/strik?utm_term=stacey+lloyd+2016+lord+of+the+flies+answer+key+pdf PDF link annotation
    • http://vijuziruzunubiz.iblogger.org/liwijasobipipawimevolikad.pdfIn PDF document text
    • https://jofenunamupil.weebly.com/uploads/1/3/4/3/134343358/temedukoxogoxidus.pdfIn PDF document text
    • https://mudatikijamowa.weebly.com/uploads/1/3/1/4/131408537/d8b950cf7c2dc.pdfIn PDF document text
    • http://gilitomenuxame.22web.org/meburoriwetitasigunutuv.pdfIn PDF document text
    • http://vafenofu.22web.org/97438261366.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_5feb981305826.pdfIn PDF document text
    • http://matagenomix.22web.org/samsung_s21_ultra_release_date_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_603d1dd04ebae.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://uploads.strikinglycdn.com/files/8863d6a9-0999-41c1-b180-9196be05cf2a/star_reading_grade_level_equivalent.pdfIn PDF document text
    • http://dasubaweno.rf.gd/11761786300.pdfIn PDF document text
    • http://kejiguwudo.epizy.com/jifodunanagobobatati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bd1dfa-b07d-4ebf-a4bd-0cb6e386031c/84246539315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf42b87-7cc3-4290-b155-29c6661b038e/7323240360.pdfIn PDF document text
    • http://sowubiri.epizy.com/kandidiasis_kutis_adalah.pdfIn PDF document text
    • http://wexugemo.epizy.com/25938278005.pdfIn PDF document text
    • http://tagejoxaluriju.epizy.com/android_auto_not_showing_on_sync_3.pdfIn PDF document text
    • http://gatutob.rf.gd/gavewepalizuveku.pdfIn PDF document text
    • http://fozanaki.epizy.com/85458498746.pdfIn PDF document text
    • http://wojodine.rf.gd/merger_model_breaking_into_wall_street.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/haryana_govt_gazetted_holidays_2019.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_off000116cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CC 5872 bytes
SHA-256: ad2568992bb68fb4da613ddb8d7015b48c13f9ca77f546a3295bd1b8c971ec62
font_01_sfnt_off00012ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC0 11236 bytes
SHA-256: b91a9eed2cb1a2b2a373afda1e658328737f1e9330299a535c9b68a9f36fcb53
font_02_sfnt_off00015069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15069 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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