Malicious PDF — malware analysis report

Static analysis result for SHA-256 f722d094334f360b…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 08:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45c2c040a330376bab2b6a6a5d060aaf SHA-1: 5fdd301a29abd741469db1bc3e8d63417d01107d SHA-256: f722d094334f360b7d2f684fccd41130eea53ab496ca9bbc56f4c3d70fa418db
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 0.9997

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://jacksth.ru/strik?utm_term=cbse+class+2+maths+book+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444356/normal_5fe8e1e10ec01.pdfIn PDF document text
    • http://cuzinfo.ru/1965_chevy_truck_wiring_diagram9t200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_603c22e6aee79.pdfIn PDF document text
    • https://sufogewanogona.weebly.com/uploads/1/3/1/0/131070160/wupurusaneseg.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jchgsgV/pabamilomatizidana.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/Rtgiwjo/best_ringtone_2020_pagalworld.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/jixosilujoxarof_vokudas_lanexuditole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fcfeb34edd4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_6001d05610d4f.pdfIn PDF document text
    • http://gouliwer.online/dipaposudawalukugetivmu60.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/jOgeehb/44969708595.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/ihtghjb/lonadowaberewarubiwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5ff852f9d2ee1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/mogudikexigotasexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf186474-7b95-4c04-b5d2-119bfcc554c4/lilowet.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/diet_for_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/advanced_cardiac_life_support_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc60800-21ab-4771-835e-6879c7172d0e/pilepuboxonezazajo.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/whale_talk_by_chris_crutcher_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/88546343250.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_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5596 bytes
SHA-256: b9e1f861db63eb614111b3307e5cd64bc1af32d607f126cb4201158a5a848c48
font_01_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 11204 bytes
SHA-256: e7ef1128a3bb36577e409e7ebd935610add48fab1342e87be6e75aae1166cd56
font_02_sfnt_off00012c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6F 3232 bytes
SHA-256: ddbf47c87d4d0fd22c7dd0b0a68c669885ed8c39e1f6be90bbcfd9c63d8a6ac3

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