Malicious PDF — malware analysis report

Static analysis result for SHA-256 0254b7515a9df805…

MALICIOUS

PDF

65.4 KB Created: 2020-08-20 02:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 90cc4ce0331e6f38d547c79f17a28dda SHA-1: 6579e53daf98d4e2606b137e2933bf626c9cbd83 SHA-256: 0254b7515a9df8052acc4f08c528843a11ca9c31014bf1e2c61a91fa7ecbd0f6
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://ttraff.cc/pify?keyword=pokemon+blue+adventures+rom In PDF document text
    • http://files.ar2cogic.org/uploads/1/3/1/4/131438111/sobuwofeseb.pdfIn PDF document text
    • http://files.omnibusologist.com/uploads/1/3/2/7/132741433/nagijul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/rejakujovexibefibawad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/9122250924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/51441139071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/70537307492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/67771091526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/starcraft_2_mass_recall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/jesow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/java_jdk_jre_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/8862/0194/files/wulakefelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/56688559809.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1E 6504 bytes
SHA-256: 1ca31ff89e5dedfb99d2400e789b6eb47734c2a6979288522f5463c89ef244a1
font_01_sfnt_off0000b353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB353 5236 bytes
SHA-256: 6eedd01375bb0780d1039ba5e2781f5a62e01ca0c127db65582a951b2dc17051
font_02_sfnt_off0000c500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 6156 bytes
SHA-256: 8ab5419a84a5586f1fa3a0f7e2462f6d2efc861be2835b1d139f2ee55539d4cf
font_03_sfnt_off0000d511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD511 10420 bytes
SHA-256: 3d528737dc04bda6bef7598100be11d62a38ac109f6514d7c679b883e3943825

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