Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cad65d74d8cfc8e…

MALICIOUS

PDF

41.4 KB Created: 2020-11-01 06:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1228088330a0d5d8f5e2b31d830475b5 SHA-1: 3d91740485c54c07e0ec61e56581d268cb2e13d0 SHA-256: 2cad65d74d8cfc8ec36fb4f16a4cce47f26839ac350c11dc455143b85e72f141
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a 'Graco rock n play recall', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=graco+rock+n+play+recall In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_5f9ddc52a9d81.pdfIn PDF document text
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/59e21a882d2.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/8313658.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/6815214.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/1/0433/6828/4316/files/jigiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/shooting_bench_design_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/87324024549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0926/1735/files/vafifobosifat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/fejokufed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8560/9142/files/44118911652.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 4944 bytes
SHA-256: 242de4d048f7cd095a711a24677bd772fac7bc0390c0c2494329f32684fba5ff
font_01_sfnt_off0000722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 11428 bytes
SHA-256: 499c6194d3906400eb495b1f34e2bc927f2134074c1695fc727c7bcdc6117298

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