Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf6000a01df7d38…

MALICIOUS

PDF

77.9 KB Created: 2021-02-22 14:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bdb00442a39f1758ae1966c2658f1b1e SHA-1: 6620de288f8f40433858ae0b50342847daf488c9 SHA-256: 0cf6000a01df7d384d881946d275362905d63240420522b367aec7817eec53ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, with many pointing to disposable domains and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect the user to potentially harmful content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=jazz+saxophone+etudes+greg+fishman+pdf PDF link annotation
    • http://topuniversityru.fun/makerere_university_admission_formsqfonb.pdfIn PDF document text
    • http://mon-cmbretagne.com/die_fledermaus_overture_piano_sheet_music_free389k7.pdfIn PDF document text
    • http://trackcreditscore.info/53604971192bmguh.pdfIn PDF document text
    • http://parkji5x.xyz/bloomberg_terminal_excel_guideeendy.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/9386048.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/foxabewezepu.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/muvev.pdfIn PDF document text
    • http://rubeatyshop.xyz/suvudiririzojavexexexef2jvql.pdfIn PDF document text
    • http://acgmgroup.ru/fail_light_red_on_verizon_onth2cal.pdfIn PDF document text
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/0c55954b3462441.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/ggfhaH2/songpop_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/hhhihdP/ramuje.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/fiwebowug_kunisulukugo_dutadikod.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/nowonovege/canadian_boer_war_uniforms.pdfIn PDF document text
    • http://suvoxezol.rf.gd/jasper_report_template_java.pdfIn PDF document text
    • http://wiwazisumi.rf.gd/63427468763.pdfIn PDF document text
    • http://gitadafip.rf.gd/18862666810.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/cambridge_dictionary_offline_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/radaveb.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/what_is_the_most_aggressive_fighting_style.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_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 5528 bytes
SHA-256: 094e1483a09c38e3a333154835e3b52ae09a24c044b1fddd21384f1c7d7d7f2b
font_01_sfnt_off00010792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10792 10184 bytes
SHA-256: 582f1154a085d80cbb3a559b7feb5aa334ffb0a0bb9aececeb12e921bf79132d

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