Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55ef3f86afb7efc…

MALICIOUS

PDF

55.6 KB Created: 2020-10-02 13:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ab9f7d085b7102cb44668ea9d0519be7 SHA-1: e36f26314bccb072880f280f36e58a9c81ee316c SHA-256: e55ef3f86afb7efc677b274a11077bb76bf6fa6d046d3c3be34f29a85bb0b02e
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://gettraff.ru/strik?keyword=ugee+no+tablet+was+detected In PDF document text
    • http://numifato.htmags.com/uploads/1/3/0/7/130775050/vevubuwori-vezevusitu-senovu-zetelulofurane.pdfIn PDF document text
    • http://purotabak.corallodge335.org/uploads/1/3/1/3/131398453/karegubo-kalijilitew.pdfIn PDF document text
    • http://files.lexcoffeecottage.com/uploads/1/3/1/8/131856919/730589.pdfIn PDF document text
    • http://jikakumis.mrelectrician.co.nz/uploads/1/3/1/8/131856235/2621139.pdfIn PDF document text
    • http://files.lakeforestcondoassn.com/uploads/1/3/0/8/130814611/dabupufim.pdfIn PDF document text
    • http://files.proedgepoolsexpress.com/uploads/1/3/1/3/131383954/luwufazuwadeg.pdfIn PDF document text
    • http://jiliwux.littlelanedaycare.com/uploads/1/3/0/7/130739624/fipakijefuwal_bozokalulowijez.pdfIn PDF document text
    • http://nadujerep.sundancehorsemanship.com/uploads/1/3/2/6/132680813/49c0d.pdfIn PDF document text
    • http://files.kathleenconley.com/uploads/1/3/1/0/131070374/6726235.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/1/0430/1897/7443/files/93774565899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4312/2071/files/the_faraway_paladin_volume_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7512/9510/files/70470577589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6737c9-a31a-4fb9-abe8-fc5fefa07cbe/56455248155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c298ea-9d22-4ada-b0eb-03c58b4962c3/meborotizakagefobomul.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_off00008f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off00009963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9963 5236 bytes
SHA-256: 4e463d76f565f2215ba3f7b16fe152ffadeab095d6bcca3f5191079a8718d874
font_02_sfnt_off0000ab53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB53 10652 bytes
SHA-256: 75dd3bca299b4b822ef751c50daae92b051e5de389078fdf72ee45568715fc76