Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7313f0f794a4e6…

MALICIOUS

PDF

52.1 KB Created: 2020-10-03 22:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 20dca5d98ed27370e3de8c882632a624 SHA-1: 2e2832d08026dd45e98b7ff51286ecaef90ce1d0 SHA-256: 7d7313f0f794a4e66cb2dc96865f52939dcaf925f2aac050a37295d2fc6d1af7
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/strik?keyword=best+vip+betting+tips+apk In PDF document text
    • http://wobif.sheslayybyrenee.com/uploads/1/3/0/8/130813592/loxisiro.pdfIn PDF document text
    • http://files.schroth-barcelonainstitute.com/uploads/1/3/1/4/131406434/5951329.pdfIn PDF document text
    • http://files.flupciyouth.com/uploads/1/3/1/3/131379559/nixawiten.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9cbb53-ece6-4867-990a-1e9d2a8d0c1e/bifozilinobufiwodezudofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529d4689-8b63-46f7-bfc6-2c9e62596634/14651892379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6bd1782-18c6-49d3-b0c6-612d748b7aad/vuvan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ff508d-4535-470c-afa4-22f10c58bc13/66758492415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/nikuxosivubagesite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8034/7548/files/pun_definition_and_examples_in_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/53649219170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4194/3463/files/44668023788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1470/9160/files/how_to_wrap_a_shoulder_with_tape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9919/6066/files/11_year_anniversary_gift_traditional.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://www.gnu.org/licenses/gpl.htmlIn 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_off00005cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBB 5172 bytes
SHA-256: e75723fdf54c41cc28680d51e246486ad3a320b8a2a8321042edea6184d998b9
font_01_sfnt_off00006e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 10244 bytes
SHA-256: e2dccf4839fd037850ad1ec46d52c56ccbc30a45e56f694fad8ecb3fcdd73b64
font_02_sfnt_off00008a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 10460 bytes
SHA-256: 10751da51de8226e7961184df2b74c6c204eb861039941edf139d20a2bb43ab9
font_03_sfnt_off0000ae35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE35 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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