Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f1245d712b240a…

MALICIOUS

PDF

79.4 KB Created: 2021-05-17 20:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2a2d3bbaa081058978771d080972e6fc SHA-1: bfe7a2833a78d7cf060906c2838f9d11a7cefef9 SHA-256: a2f1245d712b240ac5f668b874725d4e62fbdb5371b0ab25a939dd46547c8d95
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=does+the+samsung+smart+tv+have+a+built+in+dvd+player In PDF document text
    • http://stonersfranchise.com/vagebafvwit.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/RThaibC/mexegikiwolatin.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/73062314756.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/Yifjajj/ladybug_wallpaper_for_your_phone.pdfIn PDF document text
    • http://kanshoper.site/kenefogetidomamube7hnwt.pdfIn PDF document text
    • http://lg-supportteam.com/winnie_the_pooh_home_run_derby_unblockedq692g.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/jaEhf5z/74606246180.pdfIn PDF document text
    • http://gazozaxuk.getenjoyment.net/julirofozilafe.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/bZgeQhh/planets_in_retrograde_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/bif5ibQ/face_changer_app_download_uptodown.pdfIn PDF document text
    • http://tujidal.mypressonline.com/lazorazuzomazegirekofi.pdfIn PDF document text
    • https://cdn.sqhk.co/sazelusup/h6giHhj/36436416237.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/national_paint_product_data_sheetcj0l2.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/91018144-576c-48bb-a3a3-bbf1c4165112/how_to_interpret_ir_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659cb32a-83d1-49a9-8f2e-1cab180b159e/twilight_full_movie_in_hindi_part_1_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7dd99b-ebc0-419d-a02a-7b443e8b8348/chess_strategy_for_beginners_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99aa0cd2-d00f-47ac-a508-f488a77137f3/50847149981.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/diccionario_espaol_frances_larousse.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/incident_nonconformity_and_corrective_action.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 5676 bytes
SHA-256: 835d13ecea613a846437d684ab7bc44bf44225962b33032a26410b6602ab5d07
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 11728 bytes
SHA-256: 845a6351724724576ed3e0795f9c019acecb68177138241ce382c348a0a923c9

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