Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b41b93f287a8d6…

MALICIOUS

PDF

75.1 KB Created: 2021-01-19 14:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d6973a694d63734dd62232051e3c5a57 SHA-1: 1155465c30296c0581b4e6a86a8612bbade91567 SHA-256: 93b41b93f287a8d6506e3b6217418c1839bf6e56775cdcfed03c24ef7048397d
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of embedded links, many pointing to redirector infrastructure like 'ggtraff.ru', suggesting an attempt to funnel users to malicious sites. The document body, though heavily obfuscated, contains fragments that appear to be search terms, reinforcing the idea of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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://ggtraff.ru/123?utm_term=behind+blue+eyes+meaning+limp+bizkit In PDF document text
    • https://site-1175261.mozfiles.com/files/1175261/zeretuseduxawawisuvinalew.pdfIn PDF document text
    • https://jamisovuropasag.weebly.com/uploads/1/3/4/3/134396730/5e7ac523aa.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/bagisegodex-famasunaxuku-bugofotebisig-sisajiriwa.pdfIn PDF document text
    • https://xezagepu.weebly.com/uploads/1/3/4/9/134901129/gibutiko.pdfIn PDF document text
    • https://site-1167931.mozfiles.com/files/1167931/85324759980.pdfIn PDF document text
    • https://wemakevarovafa.weebly.com/uploads/1/3/4/6/134636541/4040573.pdfIn PDF document text
    • https://rajarajo.weebly.com/uploads/1/3/1/3/131398110/9cbb9.pdfIn PDF document text
    • https://site-1248735.mozfiles.com/files/1248735/newspaper_article_template_ppt.pdfIn PDF document text
    • https://xifuforemavu.weebly.com/uploads/1/3/1/1/131164534/8921820.pdfIn PDF document text
    • https://site-1176339.mozfiles.com/files/1176339/birds_that_don_t_flap_their_wings.pdfIn PDF document text
    • https://site-1217470.mozfiles.com/files/1217470/jerikutilejapinimowej.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/xtreme_jet_boat_porto_preco.pdfIn PDF document text
    • https://site-1172574.mozfiles.com/files/1172574/best_camera_mod_skyrim_se.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/wumodukubaru/mejodipipejedarer.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/dragon_village_m_tier_list.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/stained_glass_table_runner_pattern.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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5684 bytes
SHA-256: e597121b4076f94a67e44b0d93880e02c826cb94c44d719d1ce56a43dc326ff2
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 11780 bytes
SHA-256: c8a7da3468b3b122b6d50d97a539a82a29141f09726a2dde2df814ff06cd4cb3

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