Malicious PDF — malware analysis report

Static analysis result for SHA-256 90414197b73212ca…

MALICIOUS

PDF

41.0 KB Created: 2020-11-07 03:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a6821b481d00811f9701c90251a05d7d SHA-1: 5c13bdda6e2aed3487a3680f31a2663f7c428e41 SHA-256: 90414197b73212ca6860b9e2e6346ef5715dd62bdac19ae1b6143a7411cd7677
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://traffking.ru/123?keyword=behavior+data+collection+sheet In 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/17bb9d6b-17f6-4ccd-b58f-88fe240ce434/bunexisimonefexakem.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/abstract_reasoning_test_free_download.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81951a65-4700-4d7d-a066-bd95fd8850c6/29_game_download_for_java_touchscree.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/rewupeloxesi.pdfIn PDF document text
    • https://zopovamodutu.files.wordpress.com/2020/11/9534967896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444fb4da-c2c0-4603-b532-b8a3049eeae1/10452133282.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/united_healthcare_parekh_claim_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/pp4218avx_carb_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40593aad-9d7a-4a8a-89d8-d5006617429a/51003048415.pdfIn PDF document text
    • https://rakidate.files.wordpress.com/2020/11/rufirobolamopobujiki.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/42094864996.pdfIn PDF document text
    • https://kunuvulu.files.wordpress.com/2020/11/jonavil.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/youre_braver_than_you_believe_and_stronger.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/netgear_prosafe_fs105_manual.pdfIn PDF document text
    • https://tatosotodu.files.wordpress.com/2020/11/desi_chicken_farming_guide.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_off000062e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 5136 bytes
SHA-256: 9a1d33c97507923d696a2fab96d923cb4d44d929a213878e7b7da98d7c49315f
font_01_sfnt_off00007458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 10188 bytes
SHA-256: 9e73a677f990be1ce0bd9eeac633b0f745bb50f400ff0edd0038579ba9825adb

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