Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac75052814b406c…

MALICIOUS

PDF

66.5 KB Created: 2020-12-15 05:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ced87497637ffb21cc035ee03746b360 SHA-1: 91738453e9ab2e5c5d5f47e90bd978fed96222a3 SHA-256: bac75052814b406ca9c62c2f3038795fb36c7794069e9b960b6b7d767a188965
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffmen.ru/aws?utm_term=backless+dress+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f97e20722308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_5fb3c853b6417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fcd37d208711.pdfIn PDF document text
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/1548395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f93c0a3bfa93.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/kitiruvaxodesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8babd42a401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fc53682ac9d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fafe57459013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5fb041de697b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5fb6e6269005f.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/fumiposamisur/rasupoju.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/sesuxokewotese.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/capital_letters_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/nexosaseweruk.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/jelorizus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE2 4856 bytes
SHA-256: 06c2c6eef63c68c979493426f6b611e5e08394d2f73befe0975504c7c0887058
font_01_sfnt_off0000cc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5C 10144 bytes
SHA-256: 8097e020159cd3b39ad034b70054a5686734cf7df452a1f4fad76b88f286d1d6
font_02_sfnt_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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