Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2477a3a9cd6091…

MALICIOUS

PDF

57.3 KB Created: 2020-10-15 09:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 86164cc5e778f8f119d16cf2ec71e816 SHA-1: 25008e90979a7d01ec909475283401789daa4aa7 SHA-256: ad2477a3a9cd6091528c682cc596c16db4e6c17a1a3c93b7494f99ed001b7fc4
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/123?keyword=capitalismo+consciente+libro+pdf+gratis In PDF document text
    • https://site-1038631.mozfiles.com/files/1038631/kiredoxedofi.pdfIn PDF document text
    • https://site-1044029.mozfiles.com/files/1044029/30513315614.pdfIn PDF document text
    • https://site-1039811.mozfiles.com/files/1039811/lupam.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/58356402895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8713cd5ba3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f87c8fe15a0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0518/8515/files/sufirefajorekukod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9552/1957/files/pittsford_credit_union_mortgage_rates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5097/4888/files/zixisozutazitivotonod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/what_do_am_and_pm_abbreviation_stand_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2909/8396/files/sansa_stark_dress_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f745fbf2-9549-47ae-a184-bdd963c9ee0a/72045904476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af50edc0-0f0f-43a0-bc80-9ce5e7f46ff7/fetexokarovovarolawamaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b0110e-a0e0-4817-a312-ffa8fbe1d173/29640846188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4907f3ee-1ccd-48e3-a5d9-cd9341af6426/wosumis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b32856-1fdf-4a89-b1ae-d031961f5186/52222032933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6da2f4-2c2c-4768-89cb-593c0e550f05/18191071586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d325ba-30b3-4fc8-b504-0b8c8e87ecce/11837130310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f12de1-e68e-4e89-ac30-76505eba9d17/sipaduxubakutugaxuparapuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad6c29e-8569-48be-b272-f9dd09179bbd/wutadebasukigum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25aeaea-6641-4e5f-999e-2d8c5c324574/23167428360.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECA 5424 bytes
SHA-256: 2c6580364604baee216eb0e9bd2e2476e3adcddb65d4708c2db700f856d1ee1e
font_01_sfnt_off0000a116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 11744 bytes
SHA-256: a684794a12e2ea4fe3ea3c5316ed94a5be2420dc3d1e966c3e7d526f0e941c7f
font_02_sfnt_off0000c772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC772 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176