Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff7d62260bb8acb…

MALICIOUS

PDF

83.0 KB Created: 2021-01-01 00:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 902d5bf0c3a186027f62fb52f0fb87bb SHA-1: dbca01225a37026e0babaf9bb13ad46108d572fc SHA-256: fff7d62260bb8acb16c24641d8930e562381a1598747fcf70c27503c70394120
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm and is flagged as malicious by ML classifiers and ClamAV. The primary attack pattern involves directing users to potentially harmful external sites.

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 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.
  • 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://cctraff.ru/strik?utm_term=college+girl+squad+fashion+up+game In PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/5048112.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/idJNWjh/colour_full_3d_free_download_filmywap.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/3gcRcxj/lopabikifebusab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/prc_action_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc0cd41-752c-4164-846b-bd0b965162bf/me_fir_bhi_tumko_chahunga_song_downl.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/94459843265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23274564-ebd6-40a3-bf20-9bf0ecfee953/71580219763.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/6743730695.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/rainy_nights_ellington_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/loxepojijavenosevidanubim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7064cb61-a70d-4f7b-8d04-623b68801d5f/38237644942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896cf1ee-27e0-443a-bfa7-525d11ba7165/laxafagapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694b60cf-2c43-4c8f-a51b-8b58d11b144c/conan_exiles_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe1b4ae-1cd5-4f51-87d0-af245700c01b/nepowuxesuxej.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_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 5488 bytes
SHA-256: 66b3fec1c583b6d236595ca45a237eb65da6aa93c0a306bc19a4ffb8102ed3dd
font_01_sfnt_off00011a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 10760 bytes
SHA-256: 171cb195cdc593fb2e25df1bdd1c6b9f8a41548173ece84d76c94be37c1521f6

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