Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c42a5d773aa64a…

MALICIOUS

PDF

40.9 KB Created: 2020-11-02 09:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3ef52e271ce8124a586e03b723110dc9 SHA-1: 2006dfac393a0a322aa27c320035c66e6d14b47e SHA-256: c5c42a5d773aa64aab18f9eac5707a12c25e945b6fa65501821231a2bb7bc109
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/123?keyword=girl+boy+bakla+tomboy+full+movie+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f905e8e701d3.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/9468223.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/wijojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_5f9ba4e383cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5f946a3b356f1.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/loduvoxivodexer_pojipoxuje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f6e42e-7929-4076-8eb1-c450bb37f132/zibugowesiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5695/4275/files/martha_stewart_craft_furniture_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8782f156-7cbd-414c-abbd-2d92787248a0/41804654872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a9061d-bed8-4d60-89bb-580764ef9a00/bagobapej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6ff83f-8278-4132-b887-2b8a77f86365/67099961706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd382ca-b860-4762-8ab9-ab77bca457ab/kikiguvumavawalesib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74d0a53-579a-427c-ad3d-ea233ebea613/los_caballeros_del_zodiaco_omega_capitulo_1.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_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 5132 bytes
SHA-256: 3b1abbad1eb0601b1d74134173dd105e2fe32b34fc6f5157ecf3798f3ff49742
font_01_sfnt_off000071d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 10828 bytes
SHA-256: 1d56245d625640e2e2890d9080a4acbf195d1fbf9d3400bf988ae659069851a5

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