Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f27b5b9ed227f7…

MALICIOUS

PDF

47.1 KB Created: 2020-08-25 22:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1978307bd6283320aa3fecb0b29c5db SHA-1: b10a40a53a97c2ebaa49738495dbbd06fea6d6c1 SHA-256: 39f27b5b9ed227f755557c385495835bff5e8980edb4114f4b36e0599e1d31cf
202 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=halo+ce+cracked+multiplayer In PDF document text
    • http://sumeku.syandash.co.uk/uploads/1/3/2/8/132814930/40a1ba5a8.pdfIn PDF document text
    • http://files.mildonsource.net/uploads/1/3/1/8/131856602/5631729.pdfIn PDF document text
    • http://files.greenandhealthyschoolsacademy.org/uploads/1/3/2/6/132695714/2202760.pdfIn PDF document text
    • http://lijuroxo.iowaconcreteleveling.com/uploads/1/3/1/0/131070590/ziwozimugare.pdfIn PDF document text
    • http://sufimife.mcphersonroadbaptistchurch.com/uploads/1/3/1/4/131437462/xitinadus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/15759863652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/pijilukojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/xovovuxupelojiwazesidozag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/editable_excel_calendar_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/day_of_the_dead_skull_coloring_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/georgia_criminal_justice_reform_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/zunakobepesadofeserava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/varitotip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/fudewopabufav.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 4944 bytes
SHA-256: af56b0215af5247f250d9ee841fd9cd1e0e96b3321bf39f65ef76abc900b030a
font_01_sfnt_off0000713f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 3152 bytes
SHA-256: 8dd908b0e3ca7e91de56331c83b21fd212654840761c6318ae59fb3c56319db5
font_02_sfnt_off00007dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 10280 bytes
SHA-256: 6d1741fe50c23806b89f048fc1b014743798e77bc593bb4ff50fe80820e8dd0c
font_03_sfnt_off0000a0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34