Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b10c3b49f9307d5…

MALICIOUS

PDF

51.2 KB Created: 2020-10-19 10:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3e2baf531cad1e197293866ddaaff161 SHA-1: fd883c901ab7c37780a8c2e8d121eb158710102d SHA-256: 7b10c3b49f9307d5e9a4b01b4aeda1d36426da31883a64bf8c3694dd324a0463
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=princesas+disney+para+colorear+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f8a497d7cdd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8abc7b1de12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87053219405.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/pesamobasutivikulu.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/xibifobamenotexijef.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/70388ee66.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/kavozijozelona-rozos-romuvalebiw-wemigazejuvu.pdfIn PDF document text
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/gimugisetakivimive.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/mafiw-mirijodopapemib-lebixi.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/968507452.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/jexuzizujesutas-kofesi.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/3045490.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6404364.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/1/0432/5244/9435/files/63793443616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/11924576115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/rarumegegevemilusiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fd7fee-4d1b-413f-b3c1-4688494208a0/munizesunow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b84f65-c975-4710-b82e-e35bc6710202/21951214748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0186b3f-82a7-4639-9dc8-0aeaa8603fe6/neluves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727e8ddc-eaaf-4eac-91ff-0c098f0d9d10/pejape.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 5252 bytes
SHA-256: bc97350c7f21298342768f2b36f1294bb8f79aed7bc6f8fd6c5e65aa26359fd9
font_01_sfnt_off000078bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 2896 bytes
SHA-256: 904a7694502b8ec444e2d1359371b524f49fa949d2cc5b2e571045b4ebe64c5b
font_02_sfnt_off000084c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C4 9996 bytes
SHA-256: fa4ef4fbe5d93aa8f630fc083fd12465d750a3fbd3bb1288fb8963e7642af476
font_03_sfnt_off0000a6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DD 17080 bytes
SHA-256: 04c4a9924c7bce0004270e1bdd67eba218a9f7323de039a1137e729d5eef2081