Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bdde3c370afdc9…

MALICIOUS

PDF

52.4 KB Created: 2020-10-19 15:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1cc95c6b343c61f1d70bd57aae54c192 SHA-1: fa5d30ef36c1c0360b2eaa821ce2459e2c0555e2 SHA-256: 65bdde3c370afdc94c1b8cfb79fa18bddd467350a5dc35f2608bb20b796c1794
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=fm+radio+app+for+android+offline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f8ccd6097b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8703efdbfe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f88f5b53b4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f878d4bf064f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f871eb273cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8a21a6cfe3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f8b76b1d2d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f89061d5b4d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/sentencing_guidelines_burglary_other_than_dwelling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4961/9103/files/97301690228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0474/9718/files/a_court_of_frost_and_starlight_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7698/8309/files/65171913957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/jelefoboluwewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8877/1227/files/chicco_polly_high_chair_-_equinox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5318/5685/files/xudex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6a50f3-df6f-4a7d-ab04-cc2151894b3d/zedaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6379a2cc-2125-4322-86fa-93cfcfd3ef22/30415978123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0178ca12-7f18-430d-ae3e-357531ea777d/38447412097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18655fae-17ff-4050-9fec-289401592a0c/vajixofibamebam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb8bc6a-c6eb-44f3-87fa-398667c99140/14009827805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6802/5751/files/disuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7487/2006/files/dark_ride_movie_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/5597910998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/zozudipaziwowexasex.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6962 6832 bytes
SHA-256: e7ba69454ee940cad87af8b7348f88958c7730ec9ff1e8ff2f42b7eab8616e78
font_01_sfnt_off00007ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB2 4964 bytes
SHA-256: 43371aa5361561c51d8f5bbf83a72bd640e7d7abbbd5b274ae16f2bbfd2b4625
font_02_sfnt_off00008b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B82 9832 bytes
SHA-256: 84cc697d41bb8600d4cca1be5215574dc2eee80748db5bbf6e279d8731775bb1
font_03_sfnt_off0000ad5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5F 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1