Malicious PDF — malware analysis report

Static analysis result for SHA-256 745e5cd3dfd8a4bd…

MALICIOUS

PDF

31.1 KB Created: 2020-11-05 21:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 54d26e3714f038a6592c04cc67da6c99 SHA-1: 8643c84ad97a29d5efa65daa11aa210951ef5dc9 SHA-256: 745e5cd3dfd8a4bd39245955d85fedb316d0a6431b93343bf8fb9dc36bb996a7
66 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that redirects to a suspicious URL, likely as part of a phishing or scam campaign. The ML classifier strongly indicated maliciousness, and the PDF structure includes multiple links to disposable hosting, suggesting a link farm designed to obscure the final destination. No scripts were extracted, but the presence of embedded URIs and the link farm heuristic point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=is+drivers+license+a+govt+id+card PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f908fbf4daac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8cbe666267e.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/pewuwezidizag.pdfIn PDF document text
    • https://fizakilugoleji.weebly.com/uploads/1/3/1/4/131438405/af1c31a2d.pdfIn PDF document text
    • https://ganusanawopat.weebly.com/uploads/1/3/4/4/134488834/3735403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5f9a847c2b92d.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/666c4a.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/3aa87344b1e5794.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/jugepuzor-foxugulewozovem-fogewelaninepi-lababusil.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/nemafu/american_dad_watch_cartoon_online_season_4.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/how_do_you_say_youre_welcome_in_french.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1544/4903/files/word_counter_text_tool_apk.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_off00003f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F6F 5104 bytes
SHA-256: 15cef7291a3a7c56ec58c8199f693363d1e44d9b95dd07dfe9c686cbc2287e86
font_01_sfnt_off000050de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DE 9052 bytes
SHA-256: d6e83fbb2249b1a496f0823d918c2ff76a98d4d50c63d71d838cfc215f27c208

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