Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05cb612d486c8e2…

MALICIOUS

PDF

53.0 KB Created: 2020-11-01 10:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ab42b613be93e75ba83c213200239a56 SHA-1: 19c6e1543491f648c7c5b803e0f8fe6f01b11dda SHA-256: a05cb612d486c8e278553b79cce4d41de34edfde1eacded80b3137d19e47facb
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.cc/123?keyword=vhof+guide+eso In PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/8067084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f95878067ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f9603cb5ebaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f90192382824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_5f954860cf482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f8df677dc81a.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/xezonijida/fisher_price_high_chair_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/zewode.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/lobowezosunubemetawup.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/budgeting_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/80761234960.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_off000091aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AA 4796 bytes
SHA-256: 7b3522cc02713af38d261604e407ab2205f6969cf0c72d73a1494ceb718f1856
font_01_sfnt_off0000a20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA20E 11144 bytes
SHA-256: 84871e0728534a7ab41106a59c5618e668e97ad1ddc57deb4634bca2e8146cd0

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