Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3079ccfa476f9e…

MALICIOUS

PDF

74.7 KB Created: 2021-01-17 23:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 89f4236e152fc5339bf821187f61b60f SHA-1: ed45e2ec1f4b92b5d2323f16f4b703ecad2d1709 SHA-256: ff3079ccfa476f9e60684481c0d2a5a811e2f65809b3e2a13bd96e24e375c5dd
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or malware distribution scheme, likely attempting to lure users to download further malicious content or visit compromised 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 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://traffine.ru/123?utm_term=manual+of+gainful+exercise In PDF document text
    • https://site-1245969.mozfiles.com/files/1245969/icai_exam_date_sheet_nov_2018.pdfIn PDF document text
    • https://site-1178650.mozfiles.com/files/1178650/zenefobuziba.pdfIn PDF document text
    • https://site-1177565.mozfiles.com/files/1177565/teditawesoxujudizati.pdfIn PDF document text
    • https://site-1178549.mozfiles.com/files/1178549/idle_zombies_mod_apk.pdfIn PDF document text
    • https://site-1176597.mozfiles.com/files/1176597/masibutuwazati.pdfIn PDF document text
    • https://site-1168507.mozfiles.com/files/1168507/15622144330.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/penaxefiwerax.pdfIn PDF document text
    • https://site-1173433.mozfiles.com/files/1173433/84042533560.pdfIn PDF document text
    • https://site-1218567.mozfiles.com/files/1218567/misapaxokif.pdfIn PDF document text
    • https://site-1189736.mozfiles.com/files/1189736/google_ads_display_certification_answers_2018.pdfIn PDF document text
    • https://site-1212518.mozfiles.com/files/1212518/67323908860.pdfIn PDF document text
    • https://site-1218990.mozfiles.com/files/1218990/65831264623.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zugutixe/39196507895.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/carcinoma_papilar_tiroides.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/34040645719.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_off0000da29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA29 4924 bytes
SHA-256: 74749acf94bb1f841de54657bcd4b3f10faf10131759a2bb25da2a0b1e82f710
font_01_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 10800 bytes
SHA-256: 18675b2f0d3163c7af6c6e47d33ebe2e7ea1da804cd714e05c4169e6e8e88e09
font_02_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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