Malicious PDF — malware analysis report

Static analysis result for SHA-256 7958d632b6947a05…

MALICIOUS

PDF

45.0 KB Created: 2020-11-06 17:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 19fd98382b10da4d9b9bd93357a778e9 SHA-1: 15b12f6e5868020f5896083b9da3e4a9be35a4e5 SHA-256: 7958d632b6947a0589e1be32f8e2a3f3e264558a42ff21f224d20c22947c3b50
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=shin+lin+agt+final PDF link annotation
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/nepitorem.pdfIn PDF document text
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/8452714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f924ccc3fad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f97d6b966bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fa4d76350dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8f4572e247c.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/5659786.pdfIn PDF document text
    • https://jemeleromonojo.weebly.com/uploads/1/3/4/0/134041090/pexopalevudesad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f9358bce90c9.pdfIn 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/92f85658-5c09-4b71-9a84-fc6ec77b20e0/video_editor_app_for_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9f6262-b39b-43d1-b560-96378c05ef52/iklab_ne_demek.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/53508612998.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/unir_dos_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65add9cb-596d-44ae-95eb-0d5b31fc3979/26001931694.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/bobes.pdfIn PDF document text
    • https://zulomilo.files.wordpress.com/2020/11/44121789914.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_off0000732e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 4856 bytes
SHA-256: aa87b21aca285680d1d6a6b2e182a54dba96f995e04168c9ffb6e154add52b39
font_01_sfnt_off000083bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 10552 bytes
SHA-256: 7eba0dccb87186f2146ef4e192794950762e85fccf1d2485a00504f26db68a79