Malicious PDF — malware analysis report

Static analysis result for SHA-256 351bb3b175e53b4f…

MALICIOUS

PDF

35.4 KB Created: 2020-10-28 21:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d3afcaa2f6870615076030068a5f4cee SHA-1: daf086463032fc092931dc50ad34f2e508bf620f SHA-256: 351bb3b175e53b4f6929e2d33aa2ae308174b3db0517427d2955792ed3cf4c96
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=wahiawa+middle+school+campus+map In PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/c1fb6a0c05ba3.pdfIn PDF document text
    • https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/4bd81.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/durovubukogizek.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/wimina.pdfIn PDF document text
    • https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/ketupizijusiza.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d585eab8343c0.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/semikekejur.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/vabilodobafevavufit.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/teveri_gobumakewigoj_vakaposoj.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/7509163.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/guxiz.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/836834.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/zaligidubugijo_kabawejofiwuf_taragefubasujim_bifuvifirivefo.pdfIn PDF document text
    • https://pasabegimukug.weebly.com/uploads/1/3/4/2/134265340/tidivodaja-jorolobogugi-genamisafaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004dd7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004dd7.bin)
    • https://s3.amazonaws.com/pusumowi/fasixinelumikobep.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/sabre_smoke_detector_tester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c617e18e-38f7-4de5-bfc4-eefa9fae65e9/pot_farm_grass_roots_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/citalopram_celexa_davis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10e439a-59c2-4f46-a299-1ef8dea70625/98159666755.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 extracted file (font_00_sfnt_off00004dd7.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD7 5320 bytes
SHA-256: 2be9e8a6a100d364edbf8c8980066efc95b5efdbad1c1c916520b9fe444b667f
font_01_sfnt_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 9468 bytes
SHA-256: 680c8f2159a80a43437b5a1aee5073387b00f834ea537495de4888711bfe6a91