Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6821784936484e6…

MALICIOUS

PDF

78.6 KB Created: 2021-05-25 16:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b826e03ab1fe1ba597b25dfe64b0aa SHA-1: b2456cf4bb36b64bfdc561a63487414a203806b8 SHA-256: e6821784936484e6dc9d2b1cff486f88a5959f99644b1720b911f7479e7586e0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing malware. No scripts were extracted, but the presence of numerous external URLs points to a downloader or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=mario+kart+world+championship+rules
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/dapusube-vivivobonib-wexirurumofabi-vokegutoba.pdf
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/5500194.pdf
    • https://jotezuzoxe.weebly.com/uploads/1/3/1/3/131382583/zipejivesi_mopizipuwup.pdf
    • https://cdn-cms.f-static.net/uploads/4481667/normal_600d2bf1b59e7.pdf
    • https://gunimesugudux.weebly.com/uploads/1/3/0/7/130776745/nawejirosoxeni.pdf
    • https://cdn-cms.f-static.net/uploads/4455376/normal_6021d481b86f0.pdf
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/e9d48a84da9b.pdf
    • https://gadolelexuzited.weebly.com/uploads/1/3/4/4/134486477/2127996.pdf
    • https://notagudoda.weebly.com/uploads/1/3/0/7/130776089/zipesosagofu-pirez-satuve-fidizewowo.pdf
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5ff90cfb5c1a4.pdf
    • https://cdn-cms.f-static.net/uploads/4481522/normal_602832b9ed8bf.pdf
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/susajizupevima.pdf
    • https://cdn-cms.f-static.net/uploads/4494435/normal_601054a4591bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/purixifusipelid/apache_openoffice_4._0._1.pdf
    • https://s3.amazonaws.com/dikomavomem/yahoo_finance_daily_stock_data.pdf
    • https://s3.amazonaws.com/wokesabisevo/xiwekigamojuvubotokipo.pdf
    • https://s3.amazonaws.com/telasebisu/niveles_de_prevencin_de_las_enfermedades.pdf
    • https://s3.amazonaws.com/megodipewukitoj/budapest_travel_guide_2018.pdf
    • https://s3.amazonaws.com/jadere/steroid_injection_in_heel_side_effects.pdf
    • https://s3.amazonaws.com/legapatatezisa/33876038457.pdf
    • https://s3.amazonaws.com/baxekojojexusol/is_there_silica_in_glass.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81e.bin
c8903143a1409ebcf94fba58ba097daf4eeb397138b941cccabe10faa9bd6bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 5356 bytes
font_01_sfnt_off0000fa38.bin
245751d30e4af25580f1c37afde0f02f9b8df411398b4d8ab0c7235fbad90f37
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 10848 bytes
font_02_sfnt_off00011ef7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF7 4324 bytes