Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d866ec84cbdc493…

MALICIOUS

PDF

61.3 KB Created: 2020-10-14 17:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 41c8f26dcd46f3b49a78431fd3f2f834 SHA-1: 7a840edd4ef27b4a30cfce4a120e5f20afead696 SHA-256: 4d866ec84cbdc4939f42e13594391c6683a08d79312eba4f77185da56032dec8
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/strik?keyword=jeep+grand+cherokee+2020+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8707a196d33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f86f59aae65f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f86fbbc85d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86f8ab6d5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f86fc6357b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f86f7a9360ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8704f12441d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f86fcc09576c.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/23892552616.pdfIn PDF document text
    • https://site-1043434.mozfiles.com/files/1043434/24194913750.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/1/0502/2983/7982/files/palm_reading_marriage_line_curves_down.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/jumotejararomuwusekivex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7529/1286/files/vitefikatiwovetikozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8002/1669/files/far_cry_5_grizzly_bear_and_skunk_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9041/9620/files/21534335298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0303/0947/files/hyperlink_in_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5471/8880/files/geparis.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_off0000976d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 5388 bytes
SHA-256: 650f44ddeded1dcf5de6d84bd9769970945169695b9dfdc3e969bc6f0b153881
font_01_sfnt_off0000a97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA97D 15736 bytes
SHA-256: ff6ccc4ef9dedbbda522850df7bec7fe57e23aa8a14d6b842e60a15cc39f90ee
font_02_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71