Malicious PDF — malware analysis report

Static analysis result for SHA-256 9702a19d506c4429…

MALICIOUS

PDF

77.0 KB Created: 2021-04-09 05:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b3da52b5e638f07985ae2ca492723b35 SHA-1: 167ca1de0fd5b862a374575a2b41c58d02d8b0af SHA-256: 9702a19d506c4429ec7c28eefc5a147cc2abf3f327ed537af5a393cc37f8ed06
186 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+do+you+make+a+girl+fall+deeply+in+love+with+you+quotes PDF link annotation
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/c5f1f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6026444f8db79.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/bejuko.pdfIn PDF document text
    • https://lewanodeb.weebly.com/uploads/1/3/4/8/134885095/3787762.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/kotubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_6044d900dcbb0.pdfIn PDF document text
    • http://zolidunepojew.iblogger.org/kingdom_hearts_union_x_medal_guide.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/bonafide_certificate_format_for_school.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/9bd8ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5ff446608fadd.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/RY0vgga/directv_customer_service_phone_number_us.pdfIn PDF document text
    • https://kodusikur.weebly.com/uploads/1/3/1/6/131606179/d463c000ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/f4cRVAv/clash_of_clans_world_championship_qualifier_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/dMhie3A/xalosakulapajokuw.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/0Jigrd4/recargas_gratis_claro_argentina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megigezorozo.atwebpages.com/how_to_analyse_quantitative_data_from_a_questionnaire.pdfIn PDF document text
    • https://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_8ff15c46696548f78821ba2efceba10a.pdf?index=trueIn PDF document text
    • http://kimenos.epizy.com/57470359988.pdfIn PDF document text
    • https://7162416e-a815-4e2e-b4b4-2f1b6d3d7a1b.filesusr.com/ugd/0723a7_cd0d2416523c4e168a380d3088f248c3.pdf?index=trueIn PDF document text
    • http://sijuvisa.rf.gd/punctuation_takes_a_vacation.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_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 5860 bytes
SHA-256: a4b1e7c924ae702898ec775289fc6ff459a0cf10ac67520557849aab0e504eaf
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 10504 bytes
SHA-256: 956bfc7a9f1a4ef29ffb56d42ed23398f805e88d016fe1c9ca6e518a602fc4c7

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