Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af7262be03f7f77…

MALICIOUS

PDF

40.0 KB Created: 2020-10-04 14:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5eca9afb766a4c7c265c07f93462f9b1 SHA-1: f117d25f4d27f8443a1acc68a09bdbfcde4695a8 SHA-256: 5af7262be03f7f779c4ef6ab13e5cabb6ff5572fb4fcbcfcf6dcb1f2bd809d34
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://gettraff.ru/strik?keyword=stanley+myers+cavatina+sheet+music In PDF document text
    • http://files.gaychambercincinnati.com/uploads/1/3/0/7/130739684/acd54a33ce.pdfIn PDF document text
    • http://files.refugekc.org/uploads/1/3/2/6/132682167/jofeb.pdfIn PDF document text
    • http://rukox.northcobbphotoclub.com/uploads/1/3/1/6/131636725/zugubesimigaga-dotovubi-lafobevogifiz-rawuk.pdfIn PDF document text
    • http://gamebu.netlander.com/uploads/1/3/1/6/131637316/wimuronajon.pdfIn PDF document text
    • http://files.koalarescueqld.org/uploads/1/3/0/7/130776277/zatovo.pdfIn PDF document text
    • http://pajonuz.ezellaviation.com/uploads/1/3/1/3/131383483/3550445.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/ab468ae2-5e5f-43cc-99c0-e8a4a9732ee2/pofaponufemeripazobaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880f2b40-c2fb-4ae0-9da8-da3b5737a92d/44784767535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5b0ead-e244-4493-8443-771358c94206/11287154791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a97631b-8312-485f-abc9-53ee46ce3e46/91157025940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7185/1684/files/naruto_character_creator_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/firanunilevujovonivig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/pickens_county_tax_office_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/kotamifazijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/gazenamawa.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_off0000523b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x523B 5304 bytes
SHA-256: c2564702f93ad08942faecd00442b473bd4c9e2dc32be897918a545ef5824064
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 14436 bytes
SHA-256: 8a1fec02a52bbdec1d5b2b11de5be1f9b00574dd8c4ea94c823132d07504b02c

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