Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e97f14f1d03c338…

MALICIOUS

PDF

55.4 KB Created: 2020-11-08 08:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 654f74d7c8289d88f404dd63a9de1c19 SHA-1: d287c652f75f283be65cd384b99d160b923cdcc3 SHA-256: 7e97f14f1d03c3386f02fc6ebc1f9f563cb058f4f80ad20912f319c494fd6690
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://traffmen.ru/aws?keyword=final+fantasy+ardbert In PDF document text
    • https://pivebofujeje.weebly.com/uploads/1/3/3/9/133999981/c00f961.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/a2862201-7c94-4c17-920f-175321593c96/tetikosezibupapulivepixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b290d90-a43a-4317-afdb-11aa920998c5/wogola.pdfIn PDF document text
    • https://dabuvosejo.files.wordpress.com/2020/11/the_sims_4_origin_product_code_gener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a522cffb-3c1f-4ebf-981e-3f26c9ecb493/fafitufofalusosuzopag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879c4743-dd10-4948-b576-b7a71964253a/44576363999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a48a2d-c1a2-4527-add2-e8518592d1d0/nazutevidobosidaloxewak.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/nietzsche_birth_of_tragedy_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/wamize.pdfIn PDF document text
    • https://lonofoxov.files.wordpress.com/2020/11/ejercicios_de_circuitos_mixtos_para.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/the_hobbit_an_unexpected_journey_full_script.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000acc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xACC7 21488 bytes
SHA-256: c0746e015cf69e10b4087ff93e472ecfc5ecbdccbb762a4f9781084bce694b88
font_00_sfnt_off000077fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 5100 bytes
SHA-256: 961d698cf5709bc7360601cab55490bc19c568eb4490303a60abfcf63b40cb55
font_01_sfnt_off00008968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8968 10292 bytes
SHA-256: 3f33890fa87bff7efe98427347c406631e6378ab2c51f9b52f6a3f20c75c52b3