Malicious PDF — malware analysis report

Static analysis result for SHA-256 3352ffc2748a6712…

MALICIOUS

PDF

51.6 KB Created: 2020-10-16 05:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6dfa8dbdae59ba6149ace426163d86e9 SHA-1: e4536aab3d0299c69cb9de8ddd2ba24611811053 SHA-256: 3352ffc2748a671265f6ebec95d26cf2536ad4a92019cfb0a421b85cfaad0bf8
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/123?keyword=ragnarok+m+eternal+love+apk+mod In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/zavopuro.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/cac227909fa135.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/ditusodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8778dbe616d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f87383399611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f88fd9265f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8874db55864.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/8077731.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/1269372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f88cb7912515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f88d81e1a628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f88fc0122fb8.pdfIn PDF document text
    • https://site-1040347.mozfiles.com/files/1040347/67949144964.pdfIn PDF document text
    • https://site-1038611.mozfiles.com/files/1038611/setoxozoveva.pdfIn PDF document text
    • https://site-1040780.mozfiles.com/files/1040780/sipusozeterubiruz.pdfIn PDF document text
    • https://site-1043893.mozfiles.com/files/1043893/57802584391.pdfIn PDF document text
    • https://site-1041690.mozfiles.com/files/1041690/musoxisol.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ca9e8-0cba-4ddb-9cea-b99fb0201d87/92695500250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a3ac9a-8500-4693-b2b7-5d5e1149026b/fobixoneneripomegemebu.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007a76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7A76 12340 bytes
SHA-256: a5ec5869b508a46c589944a56caea6c9fe84a273f31448e58adb7e633adcdd52
font_00_sfnt_off000068bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 5232 bytes
SHA-256: 058d2bc133bee9fd6c4ddff6b82c37c94c0e722859a6b02da2988d5c089acb9b
font_02_sfnt_off00009ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA8 10380 bytes
SHA-256: fe251bf732dbb1e166d46d701480e676d2ee7968f37ca2e4091867cd0d9a22e3

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