Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a6d2a9f7648d7…

MALICIOUS

PDF

74.1 KB Created: 2020-12-15 10:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e3ad65ef01311f410f33af178f0eb003 SHA-1: 1d8178535ac106f243a910c99cff0e9106e087c7 SHA-256: d26a6d2a9f7648d76c31ee3799bdfb339da06f01b2855b89f6089c3cf93d3d57
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=cole+and+mason+pepper+mill+instructions In PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/tezowid.pdfIn PDF document text
    • https://vefutafefu.weebly.com/uploads/1/3/4/8/134882527/62345.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/kudowo/35185552040.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/88777505464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766b2eb8-8f3e-40c0-ae5f-d3d8924ade63/james_altucher_choose_yourself_guide_to_wealth.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/coleman_reese_riddler.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/65345900462.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/tupapugag.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/maltese_falcon_script.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_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 5124 bytes
SHA-256: 2a4989548661195e548f66fc2a044ae81d3c1bc018aa2eaf57570b5f084502f7
font_01_sfnt_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 10876 bytes
SHA-256: 5d3547a91a1dfb5d025f9dfe875aee938caeb6b7a3ce3361523f151b8130c998

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