Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeea135adf3f3f8…

MALICIOUS

PDF

83.4 KB Created: 2021-04-14 23:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9bee36b9e04772d6b6b32095c5b7c1e6 SHA-1: 870326605d49d5d72e9b748608265b74e937ba5a SHA-256: bbeea135adf3f3f8d2ca12373c330c793e715cac4001d7b803eb0afa88ba27e5
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 0.9996

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://mezovuduw.ru/strik?utm_term=does+kindle+have+a+backlight PDF link annotation
    • https://cdn.sqhk.co/joremeve/hgehijf/les_secrets_du_coran_pour_etre_intelligent.pdfIn PDF document text
    • https://fenanasu.weebly.com/uploads/1/3/1/3/131384656/5b31217d9.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/convert_to_word_to_edit_text_free_online.pdfIn PDF document text
    • http://nubuxeki.scienceontheweb.net/4th_grade_math_worksheets_printable.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/tujefijidaka.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/lafofewotereruvisuwobutar.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/mathematics_for_economics_and_business_ian_jacques_8th_edition.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/78bfc39fe6abbfb.pdfIn PDF document text
    • https://ropidofizo.weebly.com/uploads/1/3/0/7/130738616/setowibenixeweba.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/4hdhfSd/sos_topup_digi_code.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/8gdS4jb/lilaputiwepofenatow.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/sony_cdp-cx355_belt_replacement.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/79492247900.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/arcsoft_showbiz_5_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cd0802-30e8-4581-859e-f3e488531444/how_do_you_know_when_a_water_softener_is_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90d7246-351c-459e-9988-2c1dd9c15993/destroy_the_opposition_by_jamie_lewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1280f9-149e-4701-ba89-4068f4a6e975/swann_security_system_2k_series_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/kevaxarepisivixubitelis.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/3486268234.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 5368 bytes
SHA-256: 81016ca2d7359d13e338ae7dc119415f522f6f2abaf178acc46338f50982d639
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 4696 bytes
SHA-256: 990994bde520306ccdd7d917d0333581c959a938bfc65e3892802dc478439fce
font_02_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 11072 bytes
SHA-256: 4b3a1899da474e4e68c8849b1721ea84277bb769b66eee847379769e9917ddc5
font_03_sfnt_off00012a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A45 16416 bytes
SHA-256: c9b39f4fa90f60eadf33c41cd36cd7e029f426abbc2a11c8003b63119fca9a6e

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