Malicious PDF — malware analysis report

Static analysis result for SHA-256 95567c825efd005c…

MALICIOUS

PDF

44.6 KB Created: 2020-10-30 23:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 68e9f948766f886cfb2c5e5ef606c4f8 SHA-1: f03f14cce1ae68d6e921e7809b8d9c1eaa0d4b3a SHA-256: 95567c825efd005cac724305b7532cce50322df338d74b578c1b713a7e28a336
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?keyword=to+be+effective+iq+scores+should+be In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5f9906a3d7425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f930544e1898.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/fd29572a5f2007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7859/3943/files/10759947024.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/xudebifamakix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4670/5051/files/fanukopovafe.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/63506085826.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/syndicated_deal_analyzer_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0234/9736/files/uso_de_partograma.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/84000056795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9903/8889/files/rofotanev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9453/7898/files/bodyweight_strength_training_anatomy.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xowejono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/26316946894.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_off00006fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 5176 bytes
SHA-256: 63816e88981eb57a12434ca6779cde30ddc626591f734b4fe048fca7530b8373
font_01_sfnt_off00008174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8174 10712 bytes
SHA-256: 5b1b3d1d52bd5c9ceefd8777c65b09587bc911afed39bdfc8821dd8595dbec03