Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b490620d65c20f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-15 19:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9c824c114a33b8bc2074e9256b70c43e SHA-1: 22bd89b36a7d73dba6066e5aa8b8beefbe3705c4 SHA-256: c3b490620d65c20f5775630cd92b433d65dff6fd24650a34aa1f3227ef41f8d8
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 0.9998

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 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://xajibur.ru/strik?utm_term=brother+ce+4000+computerized+sewing+machine PDF link annotation
    • https://cdn.sqhk.co/kawurefeki/JgjdjcS/84231781178.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/brother_mfc-6490cw_driver.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/2004_freightliner_columbia_radio_wiring_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/iGhehi7/dubamewoxanakosamizo.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/55c23bf6.pdfIn PDF document text
    • https://senovetesu.weebly.com/uploads/1/3/4/7/134710525/govubosolimuki-piluxajevi-sewazoboj.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/el_profeta_khalil_gibran_sobre_el_matrimonio.pdfIn PDF document text
    • https://viwalamul.weebly.com/uploads/1/3/3/9/133997630/nanolidefara.pdfIn PDF document text
    • http://weridif.medianewsonline.com/learn_english_arabic.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/tumer.pdfIn PDF document text
    • http://wasatosu.sportsontheweb.net/xazus.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
    • http://titugol.atwebpages.com/ketogenic_diet_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/bed_bugs_on_sheets_picture.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/numb_patch_on_my_back.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/relaxing_chill_out_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb00067-f4df-40d5-8833-83d8e10b4e24/craftsman_dyt_4000_drive_belt_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4829d801-e6e4-4561-b7dd-4a5698b5c43e/how_do_you_program_a_clicker_universal_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da0a398-df0c-4425-afe1-2199673cd5f5/birujudebebevizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f295bf-0005-4ed7-a1f5-2e5b4247aa6c/87565370387.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_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 5760 bytes
SHA-256: 2ea85e5568d804aa1bc4589dcabf10001cad7b15d6f3844d147d35b70de46573
font_01_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 10536 bytes
SHA-256: e43d0b295036ac0f06f41897002a7b72c16bdff79b13be65c9b3222f1c09a779
font_02_sfnt_off00011f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.