Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4d0186380753a3…

MALICIOUS

PDF

46.5 KB Created: 2020-10-07 20:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed55f0e15b04f79091a0516559170d18 SHA-1: 0c2d3ed4b6d9740c5731463ecd8f5ac8491b81bc SHA-256: 9a4d0186380753a36b375fe7b9b5bd485a0d5610a022fc94a7af69968a871ab2
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=musically+auto+followers+apk+download In PDF document text
    • http://files.sneakpeekproductions.com/uploads/1/3/1/3/131380275/zuvunativugolotu.pdfIn PDF document text
    • http://files.jeguemac.com/uploads/1/3/1/3/131383475/b6bda.pdfIn PDF document text
    • http://gijujonuk.teamdoughty.com/uploads/1/3/1/6/131636745/b4311cc208f89f7.pdfIn PDF document text
    • http://files.frugallery.com/uploads/1/3/1/4/131454521/libokapibik.pdfIn PDF document text
    • https://site-1038759.mozfiles.com/files/1038759/41317568652.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/72446594657.pdfIn PDF document text
    • https://site-1039624.mozfiles.com/files/1039624/witefasulugoje.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/abd7b620-1219-4a5f-b8e1-b5dd06cd2e2d/genogefibenovatuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f988bee-3f43-4515-b321-1781770045a4/85883046038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/58008251876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/tamu_computer_science_ranking.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 5412 bytes
SHA-256: f661eb4b3a4d3e6344b30f55fef5330e88fc34340702ab9351da46957ac43474
font_01_sfnt_off000068fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 10916 bytes
SHA-256: 97c64431bea1ee6ebe99fc1b533c494012b8b5bd79979caabc6ae919c375c02f
font_02_sfnt_off00008794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8794 11404 bytes
SHA-256: cf859939b73d9cc5eb0b43f792dadfee971d6007d8b7dbc1813c5d580ba6c716