Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeeb9cdaf6becb5…

MALICIOUS

PDF

84.2 KB Created: 2021-03-21 21:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7a8967bb482c63ad3132d55fd0cacca3 SHA-1: 8938ad9a69003b31bc29aa1f4d8c4e3663aef938 SHA-256: daeeb9cdaf6becb514f6bab5460b4fb2536e828eb2af2411fb7d5787fc6a43a4
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content.

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
  • 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 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.
  • 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=what+merv+rating+is+best In PDF document text
    • http://pokanupat.iblogger.org/power_amplifier_tutorial.pdfIn PDF document text
    • http://sesaxojatox.iblogger.org/kuliwutatadexogibeli.pdfIn PDF document text
    • https://rowigoto.weebly.com/uploads/1/3/0/8/130813427/zarakedi_gexiwapo_bosesumawu.pdfIn PDF document text
    • http://zekuweteg.iblogger.org/functional_skills_assessment.pdfIn PDF document text
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/dbca1.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/fpggmVH/likert_scale_analysis_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/aHahavp/migatomagekodimipugisewur.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/Righbhh/13707198888.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/aca8e465c.pdfIn PDF document text
    • https://cdn.sqhk.co/gasidonoda/CQgiwja/mavoniwadoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/dtRhii8/59905437520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murajaniji.epizy.com/portable_air_conditioner_leaking_water_on_floor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a857314-4808-4fc0-9f01-640bb704954c/90442648789.pdfIn PDF document text
    • http://mugevewobota.rf.gd/how_to_use_periodic_table_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff81ac29-352f-4a7e-960b-ba2d59fddd2a/jukudumixotabutote.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/82066197729.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/medamodejujename.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/game_god_of_war_psp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ba1a89-1cf0-46d6-b1d0-757012d2d5e5/epson_workforce_2630_not_printing_correctly.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/asuran_tamil_movie_hd_print.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/emcee_lines_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/fusolevenunaji.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_off00010d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 5280 bytes
SHA-256: b2005464e6742b9c4ff5822637cbbad8aefea4f7d276f6029811212a209ee258
font_01_sfnt_off00011eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEE 10820 bytes
SHA-256: 2032394888a720058e552ff9f97c58c57636b9d1fd6942ead33e4ce448b231ac

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