Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb299ed332907b3…

MALICIOUS

PDF

72.4 KB Created: 2020-10-26 00:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 9e3844390477ebc72124d66fb271c39f SHA-1: 1e4b675743344da670b07c5bacae9f56854861f0 SHA-256: 1cb299ed332907b39425d77b45a97aa28e1a094eeebd8fe7cf4e3d881a127232
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/aws?keyword=islamic+aqeedah+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f95e63927b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f91ec85b9dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8ac1ddcecf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_5f94ec4fcd22d.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/d506fc64-c306-44d8-9ffb-e2deb4b64524/8635897071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22253cc0-85f9-4a75-93a8-e53143e01d02/sakikajevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da92cbe7-869b-433c-a0d2-d119b648bdb6/rerinatujuzadasojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3905af03-b6b6-435a-aeba-09933f21e5b1/diablo_2_dupe_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e90f36d-08b7-43fd-97e5-a1b09da721dc/63518317405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244c23c2-fe53-4a0c-a3d8-6f87dad9829d/foponodozewibinexajowuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed7dee8-8303-498c-be27-c317a5e0a4cc/67350515505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3187/7544/files/28002887014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1442/1143/files/patterns_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/16476363682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3690/1013/files/64786963867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6829/2764/files/15396748229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/tommy_hilfiger_ladies_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7901/8912/files/corsair_vengeance_c70_mid-tower_case_-_black.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/nimobuvakefibebed.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/72754715242.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/45375322082.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/word_analogy_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/beethoven_piano_sonata_23.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_off0000e57a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE57A 26160 bytes
SHA-256: fe1a125325690e57428ce291ffce4e23d436525ec59bd31949f10e583256f99a
font_00_sfnt_off0000a81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81D 5364 bytes
SHA-256: 80d3a0e76dd976e4523cd59660bff2831f9c3bf20051f5fb8b058816bdb5966c
font_01_sfnt_off0000ba30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA30 13732 bytes
SHA-256: d80e9dc92b280126396113f2351b2d82cf0dc69af41c46bf9b5bf70718ab8e31