Malicious PDF — malware analysis report

Static analysis result for SHA-256 934b2118326bb9ce…

MALICIOUS

PDF

43.5 KB Created: 2020-10-15 17:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8992919ee5ea60677e8da145300e3a8f SHA-1: e7a8e5c90af24c823b2cdfd73dadb8ddabd8b3d2 SHA-256: 934b2118326bb9ce0e483202c5753c5cba257a49dd4ec59b43caa990f5663260
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ppt+to+pdf+converter+free+download+offline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f87e506b7d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8712d7c2fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f870af59550c.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/fe9f3f43fa3.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/3713778.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/fagol.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/fobijezex-fupixugeda-rukub-kalajodez.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/duguweleda.pdfIn PDF document text
    • https://site-1038990.mozfiles.com/files/1038990/86369034284.pdfIn PDF document text
    • https://site-1043923.mozfiles.com/files/1043923/45664918714.pdfIn PDF document text
    • https://site-1042931.mozfiles.com/files/1042931/15331540119.pdfIn PDF document text
    • https://site-1039315.mozfiles.com/files/1039315/besopepiboxevunenerufujef.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/a4b79ee1-d355-4268-b599-735d88f2f70d/senewukakudajok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb741ce4-6504-4398-ad09-dca779c190ee/jigalilurugolanadebabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de466faf-9cdb-4ac4-be35-5d09e1846915/88915517728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc26d43-1c55-470c-9b59-db52d41e1e29/24818098330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb931f26-e8a3-4a7a-b8f4-3a7bdec52fb5/38747131002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fc3e08-d99d-4ac7-abbd-f8338ffbbb89/20329218818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87e066e-b32e-4c15-b650-7fb4853b2fe6/tiwusuvupekoroboxefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02ae0fe-0c67-423c-a11c-40d798c861df/1363888692.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_off00006bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEA 5124 bytes
SHA-256: 22857e4024590427b2a9a1da9387ee464e279116a8183068ee011d7b6d1cf56e
font_01_sfnt_off00007d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7A 10252 bytes
SHA-256: 5da11abfa29d99f6e2ff97c38cf5ba7bee434d37b32d055468ea57ade2ce7ad1