Malicious PDF — malware analysis report

Static analysis result for SHA-256 4624576b6bed6113…

MALICIOUS

PDF

61.7 KB Created: 2021-02-10 07:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 034ebf719839f1856c3e956a16903b38 SHA-1: 0a5a23972817f49c9038f531e4c175a230dc836d SHA-256: 4624576b6bed6113ec1c9f4337b2c25179ee6f1da4e2cff544b9cd6aede0cda0
186 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document's structure and the presence of embedded URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wb?keyword=mn%20dhs%20licensing%20child%20care%20forms PDF link annotation
    • https://cdn.sqhk.co/zilidadakole/cRhahaM/boy_go_games_minecraft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_60224a5a5a920.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/7728249.pdfIn PDF document text
    • https://vodesaladamaju.weebly.com/uploads/1/3/5/2/135298616/nibepisexem_sesaxalenaze_tafijowomume_fisibotol.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/f8cjbOa/dw_drum_set_price_in_sri_lanka.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/ejhdieu/2713233160.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/gffghhT/bud_farm_grass_roots_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vitupofelomar.epizy.com/tarde_languidece_renacen_sombras.pdfIn PDF document text
    • http://nerelikeg.epizy.com/sepepibojizumu.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/headlight_bulb_guide.pdfIn PDF document text
    • http://binalidagu.epizy.com/55764551641.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/aprendizajes_clave_secundaria_historia.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_off0000b59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59C 5440 bytes
SHA-256: 912dbcf181a8985327d36ba81f096b07b65e3099d69fa7c462b1ef589b6c5a60
font_01_sfnt_off0000c7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 10008 bytes
SHA-256: 05691df56a4c4cc574f491173c36ff797af3982d5cf05817a8c4a3b4a37f7eb3

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