Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f616af435915d…

MALICIOUS

PDF

73.8 KB Created: 2021-03-20 10:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee0ab22492305f72734f7400bd06db8d SHA-1: b0c1ffd2f1c62b33f3be3a5e51022baf5be62a16 SHA-256: 6d0f616af435915d9ff67a915e50f8df9c42029a5cd8e35957d6a30af57cdec2
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://seumenha.ru/strik?utm_term=shimano+sm-bcr2+di2+battery+charger+with+usb+power+cable PDF link annotation
    • http://roxedizusugu.mywebcommunity.org/how_to_install_a_fantastic_fan.pdfIn PDF document text
    • http://fitit.space/45343105368c5002.pdfIn PDF document text
    • http://phillipen.online/mulekepadevutukiw418r.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/nombre_rationnel_exercice.pdfIn PDF document text
    • http://stat-index-co.com/rabamifubuxumiginat5fs7.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/synopsis_of_attendance_management_system.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/usps_priority_mail_express_international_tracking.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fe6265e19e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372987/normal_5ffe109dbb2c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481411/normal_601855e113d97.pdfIn PDF document text
    • http://vodoroding.info/wilazamodimuvadokomagififojmwf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fd05d87000e8.pdfIn PDF document text
    • http://opensol.xyz/club_car_golf_cart_battery_chargerdl53q.pdfIn PDF document text
    • http://xitnet.fun/hills_of_steel_hack_unlimited_gemsygq1f.pdfIn PDF document text
    • http://gatorama.site/kof_98_um_ol_apk56vwc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_6054eb5612d77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_49ecbd463fae4741b4a6949f015b6a70.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_c2c83d5d2cb34e3eab7766136851ec33.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_d809a1ff39434097a21abd8cfd179edb.pdf?index=trueIn PDF document text
    • https://b1a3a363-0690-49f7-9fdb-0cf2a37422ae.filesusr.com/ugd/f34823_0b6d551fae4941d59fea25fb0cfe23f9.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 6088 bytes
SHA-256: d691d8723722332705bf0cd284b9f81c6010351107bb93fec93c988a331d6b80
font_01_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 11872 bytes
SHA-256: 0d4aa742def9a328416dc67b77403092723cc0d4dfdd787ee4802bbd67d81b4b

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