Malicious PDF — malware analysis report

Static analysis result for SHA-256 efad2fe485d091db…

MALICIOUS

PDF

74.9 KB Created: 2021-05-09 15:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b8832aa14ccb0746ffaf8dbe4ff4acaa SHA-1: d9df3ddbf3be697c64b471d4e513f3f8ec1552de SHA-256: efad2fe485d091dbfbe9f7ce57201956551c8af01a82dc6fabb95cf0e3add257
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=the+mortal+instruments+graphic+novel+volume+2+read+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fe225e5bdf94.pdfIn PDF document text
    • http://fofesivolu.iblogger.org/dirigud.pdfIn PDF document text
    • https://cdn.sqhk.co/jupuvonijor/6FQxVii/vocals_for_fl_studio_12.pdfIn PDF document text
    • http://comforfemj.fun/dr_berg_intermittent_fasting_meal_planoteps.pdfIn PDF document text
    • http://oneitstore.pro/voxumijoputapekagatobenokr62vy.pdfIn PDF document text
    • http://activa-fb.com/tikugalisuvedowzf3kp.pdfIn PDF document text
    • http://lixamewura.iblogger.org/41177783259.pdfIn PDF document text
    • http://roman-holidays.shop/velenugoripsj.pdfIn PDF document text
    • https://cdn.sqhk.co/litojavu/ehzP9oR/fewutimuwoxolagub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_602fe1b0d088d.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/eqiavBF/ravewikimisozuxukobifupa.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/3hgd0ja/barycentre_partiel.pdfIn PDF document text
    • http://diwizog.22web.org/game_dev_story_2._0._3_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/gigikib/33465650037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevumum.epizy.com/numeginux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969426ed-5bd3-4d9b-add9-ce4626b40b39/xorolubavokepetejizaxetoj.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/cisco_ise_licensing_guide_2._6.pdfIn PDF document text
    • http://jadatijofe.rf.gd/kupefatiruwesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caa70a6-7fb3-458a-a9de-55953657ad22/44897873730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c987bc7e-fb9c-4546-b06c-af2b928c5bf4/honda_eu2000i_generator_carb_rebuild_kit.pdfIn PDF document text
    • http://bepurerenutaf.epizy.com/69914543504.pdfIn PDF document text
    • http://bakuguweveb.epizy.com/likidesowijafoperote.pdfIn PDF document text
    • http://dufupukisamu.epizy.com/votopu.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_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5628 bytes
SHA-256: e2efc26af5abf52632b16dc021e36fe87d63bf1fa492b1b29c687383b7795d71
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 10308 bytes
SHA-256: 48c7803f212f7f443fa04f1be55cebc0b6789645a4715442c01a27facb72e56b

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