Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f796053c52b91bf…

MALICIOUS

PDF

66.6 KB Created: 2020-10-15 02:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c3dfec880ebbc2d120ea418ee8eabef1 SHA-1: 6e5d54e7e8f313cc7317bee4312bf49bce1f40b0 SHA-256: 7f796053c52b91bfe01231429ef8d1815d92f89ff55ed8537c009ab7a676dfd3
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://ttraff.me/pify?keyword=amigdalitis+cronica+pediatria+pdf In PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/58506829639.pdfIn PDF document text
    • https://site-1041949.mozfiles.com/files/1041949/3250419628.pdfIn PDF document text
    • https://site-1042498.mozfiles.com/files/1042498/recuperar_conta_gmail_android.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/3722862.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/5424780.pdfIn PDF document text
    • https://site-1039919.mozfiles.com/files/1039919/zawetitotazole.pdfIn PDF document text
    • https://site-1037850.mozfiles.com/files/1037850/birike.pdfIn PDF document text
    • https://site-1043536.mozfiles.com/files/1043536/75435379794.pdfIn PDF document text
    • https://site-1043373.mozfiles.com/files/1043373/49020935795.pdfIn PDF document text
    • https://site-1039311.mozfiles.com/files/1039311/femadoderet.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/077ddc88-0c79-4c0f-b2e5-6064b0cf23dc/penifijabadenuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df4e77b-e217-4d5c-9257-f9ad85bb67ad/pabozopazejobenesegun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cda1bb6-39da-445c-8a4f-d72dde2862c8/86610021973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e7b1db-bf95-4dd7-985e-e74c2a501d2e/vazejuroritag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886d7b94-1830-4aa9-8175-2bf7e05ba70b/dagigigozuwoxabalizig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953a8ee7-93bb-4f73-9737-9fea051d1867/fejamuxazakavepigopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f5b8ca-34ba-4615-8af4-47e3c069e82a/91921961769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8643/9089/files/total_productive_maintenance_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7688/8992/files/hd_movies_2019_app_apk.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_off0000c036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC036 5464 bytes
SHA-256: 0cbf0dd6d47f1c029ac5ecc12ec3088d1eff379e26fb2b8d6c81056e1f43e66a
font_01_sfnt_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 12980 bytes
SHA-256: 0ab15fa01c1e73aa3d9fb0e2960594ac317fc3a9173ff7f1c4ada5aa364e91ac