Malicious PDF — malware analysis report

Static analysis result for SHA-256 802a4e78e4604a65…

MALICIOUS

PDF

41.9 KB Created: 2020-10-16 17:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f247d0d6f6829f4e8a27d8b12ee029e9 SHA-1: 750ac611448abcbdd5018b2a79983265aabe03d7 SHA-256: 802a4e78e4604a651c7bedd12dac0316b8f15550ec94333cc81f618fb2c353e7
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/123?keyword=diwali+photo+editor+2020+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87085b1619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f88056767a45.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/momed-kujisosejo.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/7114067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7290/4088/files/worksheet_systems_of_equations_graphing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0793/4103/files/53478090762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7643/9198/files/28991593174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/39283732043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2812/3295/files/android_marshmallow_location_permissions_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5276/8666/files/green_basilisk_lizard_facts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8537/0022/files/posting_certificate_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0981/8274/files/jimmy_buffett_tour_2020_cincinnati_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9493/8271/files/47178455085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7527/2349/files/animal_crossing_new_leaf_rom_citra_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5757545c-fbad-4a0b-86f5-c3a766335a0d/lurapebabenosapezuvuzowej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8772a0-330d-4c39-8009-8a597781622f/gufaled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cfe65c-a986-46e4-bbf3-877ff5426028/sikakomofixaxiwakag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645d667a-bbc3-4f1f-bc7b-596c861aee51/11415011310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef02da41-7141-4da2-93cd-173e2f2029f0/nujusopepevaxegemidimega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7421025d-fc45-4b2b-9c67-b7a76b4da50b/nemodunefeditugajeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccf53b1-9326-4594-ae50-00318651e85c/68936605364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165c6ef5-5d0a-44f4-9653-07bd17240ca8/7883843464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78908cda-002c-406b-962c-feae516d657c/sajoreximonofimabujo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 5300 bytes
SHA-256: d378d3f5e9c463c01d047a751751c7cf15b566f0858af6e0b3426d58f105abff
font_01_sfnt_off0000789f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789F 9724 bytes
SHA-256: d2a58eb802b633c8802d53000e46b5c25a497f33e2f736294024fccee4cedd47