Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e25c650143b076…

MALICIOUS

PDF

45.2 KB Created: 2020-10-26 10:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 93e59610ba4c605511b32b303a4bbb64 SHA-1: 2a41979982e22898b83c07035abea7b041d174f7 SHA-256: 30e25c650143b07651e322d6ad624c84302600d647f513aeb68b5269d69706c1
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious and associated with SEO-based phishing lures. The document body, though heavily obfuscated, contains text related to 'Candy Crush Saga download apk free', suggesting a lure for users seeking to download software. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/123?keyword=candy+crush+saga+download+apk+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f91ee162affb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5f8e705aa06f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f897eb7a2eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f9343885994f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f95d612aef0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f889ec7af459.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/1/0266/8858/5906/files/hermit_crab_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8587/9704/files/27328007612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/southern_northern_western_blotting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1711/8111/files/bivigulikoxatidumigana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7a5523-b1f5-4504-b7a2-e26348e977f9/36266720425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f35357-97b8-4521-9a24-a42adbff326f/61665080410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a437b67f-b104-4d40-92fa-90ec8262015a/9867826967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec61d21e-010c-470e-8981-824e2dec32d2/luka_chuppi_songs_download_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sql_injection_attacks_and_defense_2nd.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/benixesepewenojafa.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/bloqueo_av_de_3er_grado.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/biology_11th.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/geliwamagover.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 2

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_off00007038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7038 5580 bytes
SHA-256: bf8f0c930ce6dc102230843ed6e4dbb6e0bda90c4a4f4b72d1988057cabdaea8
font_01_sfnt_off00008347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8347 10900 bytes
SHA-256: e534219f3537fc6542bd1e27ca906988a2813e9a4a9e8ed2b5106428655f99e2

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