Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b3f85d27f04039…

MALICIOUS

PDF

66.0 KB Created: 2020-12-19 04:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7c717ba888a1f57cc11090d0533009b0 SHA-1: 591ea4576b9c7b03b84cadc5981208cb546575f7 SHA-256: 58b3f85d27f04039692abe86c3f1ce1b66d7af81e60a7d3de1ad4d5b73267d3e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier also indicate maliciousness. The presence of numerous links suggests an attempt to manipulate search engine results or to phish users by directing them to malicious sites.

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 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.
  • 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://traffine.ru/strik?utm_term=ruinous+manor+guide+essential+mana In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5fabeb445564c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fdaaf2dd4ffe.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/rofoweje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5faa4049bd16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f9130a28f91e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fb2ce9508cdb.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/zomuzigo/razamalofaxoxoron.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/puborixitetes.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/lake_del_valle_current_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275f35f5-8b9d-44ae-807c-863e332a76ce/puvutefugigarokijawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6051d48c-a84a-467f-ad99-e6351d5f68dc/kpss_genel_kltr_genel_yetenek_deneme_pegem.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/fakot.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/tupipedilive.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/dasodon.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_off0000c4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C9 5152 bytes
SHA-256: 713c0b0798d610866694e4f7f00732844977023cf2e99f60f19292a07507ab7c
font_01_sfnt_off0000d637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD637 10932 bytes
SHA-256: 159fbb0e4abd4af6925c000bb498f56bd257e936e18e9c5685788d103e575dc8

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