Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0be1cf65a779221…

MALICIOUS

PDF

74.8 KB Created: 2021-02-24 08:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0852c2774a337bab5a7a6f1f363ccf88 SHA-1: 017e3f25bf34cd707af43d5b6738445b7f95ec5f SHA-256: e0be1cf65a779221ece31d47c839be5e5df4a89e0122d3e1a9c21e40547c61fe
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation scheme. One of the embedded URLs, https://maypoin.ru/wix?keyword=fan+made+pokemon+games+2020, is likely part of this scheme. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/wix?keyword=fan+made+pokemon+games+2020 PDF link annotation
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/6002805.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/417f1.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/c415a6dcf2eeb.pdfIn PDF document text
    • https://xeruterone.weebly.com/uploads/1/3/2/6/132680908/xozup.pdfIn PDF document text
    • https://cdn.sqhk.co/julubesaf/Kbajbjb/chain_reaction_game_show_rules.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/vumevofajebeduzo.pdfIn PDF document text
    • http://thesimplycompleteseries.com/tobisogewadonofalodagus4iqc.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/nevorugupuwezawad.pdfIn PDF document text
    • http://myfirstsite.xyz/idol_champ_apk_latest_versionfhv3h.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/fizujo.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/6310762.pdfIn PDF document text
    • https://betutoza.weebly.com/uploads/1/3/4/8/134899773/1314527.pdfIn PDF document text
    • http://robertferrell.net/catalase_experiment_data_answersp3l9n.pdfIn PDF document text
    • http://freds.space/95488747491fhku0.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/1610784.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/liwafo/80628285010.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/bbc_iplayer_radio_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/jisugiwu.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_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 5444 bytes
SHA-256: c6a51bd30189374da0cd15076fde50227716a1f9685ed250a4cd32bb11588ddc
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 11252 bytes
SHA-256: b64301bc17276412052d10924af544b3bcaac4b38741609fb980f74f7e5e1772

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