Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d5e201fca0bd8c…

MALICIOUS

PDF

55.7 KB Created: 2020-10-09 08:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e704462668059771bbde832afe956144 SHA-1: 34efdfec73410c7aa9642eaa084f9c2c1c8f3087 SHA-256: 05d5e201fca0bd8cd9e840b42d97033fc8ca4c99718a8df2c7cf54bc0810854f
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://ggtraff.ru/pify?keyword=mcoc+act+5+chapter+4+guide In PDF document text
    • http://files.kvag.net/uploads/1/3/0/8/130874012/koragudujux_tozez_wirizo.pdfIn PDF document text
    • http://dijokix.nhvfd18.org/uploads/1/3/0/7/130739595/pewukewuxenamuv_tiwad_tuwudoguzolol_mopab.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/426a0947-d152-4be3-8211-ad1f8d4e26f8/82536707588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b032fe8-4a22-43b8-a620-c0ff0170fc8d/7181625705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8f703e-5d01-43f2-9c69-1551c626c68e/mededekafipog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec2480f-7e58-4810-9ce8-6d1f148a86fa/komarenimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076926ec-aa02-48ab-90ef-cd479c6dd0db/depupejerojerebezubebofut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688df642-b50f-4e02-bbf6-c898a94fc195/redaxavogewakigifinime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8289eac-2a6b-4bb1-a9c5-8aa6cd92892d/6997754804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e6c994-6724-4a4c-970a-cd51e0242ae1/40305370512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a9cec2-9d8f-40d7-8535-d40a24aa01b1/5139848245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/gayatri_mantram_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1716/0862/files/mad_murderer_knife_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3106/3449/files/folding_craft_table_armoire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4316/7651/files/clasificador_presupuestario_2019_ecuador.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 5340 bytes
SHA-256: 61d7af85e6e4b59e67ce6fd472b0684fb4b43f607cd268b8b865c8d1172defe2
font_01_sfnt_off00008d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1B 15296 bytes
SHA-256: 0072143f543af7282b9e6dd51cdcb49371eabffc14bac3a14aa098f48c21790b
font_02_sfnt_off0000bce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE2 16116 bytes
SHA-256: 3dae81b76154e7c62b3b0d30507344c78f02ee9172d09a03fe7a9af96af9e849

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