Malicious PDF — malware analysis report

Static analysis result for SHA-256 4544e09721e8b383…

MALICIOUS

PDF

48.2 KB Created: 2020-10-23 20:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2b1ea69d60d81446358ca00a396f2410 SHA-1: b1ef785db823fc5272c817a34b21655d5971b2d0 SHA-256: 4544e09721e8b3837eac02e0374c979cab67892c052814cd7811ceda97945c48
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ttraff.me/aws?keyword=azoospermie+s%25C3%25A9cr%25C3%25A9toire+pdf In PDF document text
    • https://norenepativen.weebly.com/uploads/1/3/4/3/134315866/e79cb6adfa39fa5.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/5844901.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000078f6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000078f6.bin)
    • https://cdn.shopify.com/s/files/1/0483/4371/1907/files/ai_ay_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/sediv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/national_association_of_hispanic_nurses_phoenix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/bitmoji_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/difference_between_absolute_and_comparative_advantage_in_tabular_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/92176479809.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/ranalulibomafujejelade.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/48516522860.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/logica_filosofia_aristoteles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97774fb-f0f5-47da-a7d5-f8561eb77b3b/lizirilixamikoxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7583f689-9443-48cd-8bc6-38cecd230f47/brother_mfc_8890dw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e890d9-3ed6-4286-96bd-e702f9b58198/fowiretepilisibevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4299/8938/files/76013896976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7813/9035/files/55444967534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7806/7393/files/traditional_mexican_clothing_female.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2356/7512/files/lijusetedusibizebam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2113/5783/files/the_stranger_shmoop_part_2_chapter_4.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/xutowamonodowadomizi.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/retencion_de_placenta.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/69344727808.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mitukaresevoneru.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/2668809516.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 extracted file (font_00_sfnt_off000078f6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F6 5240 bytes
SHA-256: d253da34d3638fd4c0e7f44ba2b8b86cfb70197c1bdfe11426ced57771da7a76
font_01_sfnt_off00008a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7D 12316 bytes
SHA-256: 7a9cf32da5d67b813b9364ab5430a2e349c8547da10cec797b5102c1ea89ca2b