Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067b4cc8a254715…

MALICIOUS

PDF

79.5 KB Created: 2021-02-26 16:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 903983580b9c34463c8606c73cbf1aa0 SHA-1: 43a0b4bdfc21bbee037464c1ba2e3a861c8d139d SHA-256: 0067b4cc8a25471575c67f643664eb6b63d59dfd772ba4effb1b496a994c1249
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/123?utm_term=what+are+the+biggest+social+justice+issues In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383561/normal_5ffcd8e65a292.pdfIn PDF document text
    • http://igcopyrightclient.com/unified_chart_of_accounts_for_nonprofit_organizations_quickbookstx7fs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_601ae5f63a071.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/V97ge1F/zovajavud.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/dibodozisitilo.pdfIn PDF document text
    • http://fastgetme.online/457169553379hpb8.pdfIn PDF document text
    • http://clubstore.info/picsart_photo_studio_apk_for_androidd2loz.pdfIn PDF document text
    • https://cdn.sqhk.co/susorajin/tzjhs5d/business_plan_template_word_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lodoseduler/YDgj2Ql/rowujovewago.pdfIn PDF document text
    • http://acgmgroup.ru/xegusifonometi9ix3l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404969/normal_5ffbbbc1d0920.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jdie2Oh/51124323451.pdfIn PDF document text
    • https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/butetokaneb.pdfIn PDF document text
    • http://seomagnat1.online/1527827334246jjf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ffc2f70272cb.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/jadere/portfolio_template_indd.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/waluru.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/como_se_dice_manualidades_en_ingls.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_off0000ead8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 5064 bytes
SHA-256: 5c7d9ea823b9c2e3db62369fbbe1890852ebeb213ea5757c789f7415001b1943
font_01_sfnt_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 11268 bytes
SHA-256: 98e46780d58110de7c2ecc5d6ef8b71cb90fcfa038f65bf630845cd8445b25bf
font_02_sfnt_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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