Malicious PDF — malware analysis report

Static analysis result for SHA-256 58147fa6a6a01ce5…

MALICIOUS

PDF

51.7 KB Created: 2020-10-03 01:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d7d2dfc7f44f1a664a0041ac05b1e6c3 SHA-1: 768b1c0a75c2310eb318d76bcdc64c4e24e7cb3e SHA-256: 58147fa6a6a01ce568d38c7af47246b4470def060b4abd0f4c2ecef7269668a3
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://cctraff.ru/strik?keyword=guided+meditation+for+spirit+guides In PDF document text
    • https://site-1039852.mozfiles.com/files/1039852/peverefogegubupaduzuwe.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/pobele.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/xiwazedave.pdfIn PDF document text
    • http://wuzor.lilianholm.com/uploads/1/3/1/3/131381045/8421934.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/1/0496/5564/4324/files/19622429260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7253/5707/files/57246189412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7637/2630/files/at_home_properties_college_station_tx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/kawetarubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/city_of_santa_monica_job_classifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0639/7096/files/jirod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEA 5240 bytes
SHA-256: 5381260c77ae0374fe110591f2d5e53c9a0a23bdb5a67b3889daef8370f30be6
font_01_sfnt_off000090aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90AA 10408 bytes
SHA-256: 1624734509843f82bf5c15a877bd0a608f48a23d7b6c9dc0c9526bba7ed7b6d9
font_02_sfnt_off0000b448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB448 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2