Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a9df5adce8f0e9…

MALICIOUS

PDF

51.4 KB Created: 2020-10-15 23:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b58e9396609fa300b8ed9170665c4715 SHA-1: 42764b6ec16497b15d1ec2eda2aa148732070351 SHA-256: c4a9df5adce8f0e9364dde58c1b9be9ecf74b6b0d92a1b241036373ab0959d7e
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/123?keyword=mercedes+ml350+owners+manual+pdf In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/fulevevirorovesin.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/29a74792af419.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/tujaz-zinitikaj-xelutizij.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/nuwisugasix_nobugeron_nenamapuw.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/3b0ba99ac7.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/firimi-mavizudinafe.pdfIn PDF document text
    • https://site-1039703.mozfiles.com/files/1039703/27225933907.pdfIn PDF document text
    • https://site-1043559.mozfiles.com/files/1043559/31465065456.pdfIn PDF document text
    • https://site-1043667.mozfiles.com/files/1043667/52433360793.pdfIn PDF document text
    • https://site-1044115.mozfiles.com/files/1044115/60849331365.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/1/0501/1472/3990/files/garmin_235_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5753/2065/files/gefazebawujikizomaviba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/tuvixenokoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8301/5357/files/www_ecfmg_org.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b60c33-6b0b-42fa-9938-7ef825b873f4/56478151934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcee0fd0-d54d-4594-8ed0-e83b620c77b2/90919047176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3a5cb2-0495-4ae5-9bf5-2d39a78336e9/vumeduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d975e98-a3fd-4854-ae6b-ca9fbc48d387/54131917969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/mortal_enemies_skyrim_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/albatross_around_neck_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4909/3797/files/xunefevugiliba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/chapter_13_the_commonwealth_of_byzantium_outline.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_off00008a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 5828 bytes
SHA-256: 30cfac364965de9c31d9b10cb195ffb58e84ff7cb6e4d95f3352da8aee8cdfb2
font_01_sfnt_off00009de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE5 9988 bytes
SHA-256: ad614c7dc27c29cb85747c5282a70dfa5aee83fecb4453dfcb3d8fbac9ab256e